I thonk our realm was one of the first to get these changes rolled out, and since that happened I haven't had a single problem with 'additional instances cannot be launched'. Before the fix I encountered that problem almost daily. So the increase in capacity has definitely worked in my experience. On the downside, I have experienced some increase in lagspikes in instances since the change, but they're still very infrequent and a worthwhile price to pay for the extra capacity in my view.

Same here, haven't seen or heard of an "additional instances cannot be launched", but lag overall has increased - in and out of instances - as well as our queue times suddenly skyrocketing. Don't know if that's related (we joke that they stole some of the log-in and World servers to increase the instance ones) but it was incredibly coincidental. Other than that, have seen no issues.

Before the fix, it was nearly impossible to enter Outland instances (normal or heroic) while Northrend instances could have waiting times of up to 15 mins on Terokkar.
I haven't had any problem entering instances since the capacity updates were implemented. Hopefully other players will confirm that the "additional instances cannot be launched" words are forever banished to the twisted nether.
Thank you Blizzard for addressing the issue.

EU/Khadgar, 2009-10-01 at around 20:00 CET:

Vault of Archavon (25) was so laggy that we barely managed to do Koralon within the enrage timer - we decided to skip the older bosses due to lag. No problems in Trial of the Crusader (25) or Onyxia (25), nor the 10 man versions two hours later.

This could of course be unrelated to the capacity changes.

My mains were on Alonsus until two months ago, and were doing regular instances, i honestly only hadthe issue once or twice, i then transferred to Ghostlands, and have never seen the problem, maybe i was just lucky in that i tend to play through teh day when it is fairly quiet

Massive improvement on Aerie Peak since the updates. Still some "additional instances cannot be launched" during peak times tho:-(

Seems to work, cheers Blizz.

I haven't had any issues with entering instances any more since it was fixed either, though as a few others reported, the server I play on has been a bit laggier in Northrend since the fixes were applied.

Also on Blade's Edge I and my guildmates haven't encountered any problems getting in to the instances, even at peak hours. Also you don't hear a word about it on trade anymore, so I guess others don't experience it anymore either.

Good job!

The server on which I am playing was among the last to receive the updates(Executus), We had some strange thing in Trial of the Crusader:

Wednesday 30:
15.30 Killed Onyxia 10 man, no lag, beautiful server performance.
16.00-17.20 Cleared TotC10 (alts), no lag, beautiful server performance.
19.30-20.00 Cleared Onyxia25, no lag, beautiful server performance. Which was unexpected as the place was extremely crowded.
20.30-21.30 Cleared TotC25 Normal, no lag, beautiful server performance. Which was also unexpected as there were a lot of people in the instances at this time.
21.45 ... Pulled Beasts in TotC25Heroic, Around here, hell broke loose. 10 sec lag spikes, half raid disconnects, Boss seems to be lagging as well, he is not hitting the tank except when there is a brief 1 sec non-lag, We Pop heroism and most of us manage to hearthstone before dying in horrible lag! Very unsatisfying performance! "bloody server, crap maintenance, stupid upgrades, retarded *gaming company* " - were among the words uttered on ventrilo.
22.15 -> 22.40 Cleared TotC10 normal, no lag what so ever. Beautiful server performance.

Thursday the 1st:
We went to TotC25heroic again, and played without lag, a few players disconnected, and some had small lag spikes, We got a theory it is because they got 20 years old PCs and live in stone caves, but it seemed to be to many and to random for it to just be the PCs faults. + It only happened on Beasts. So something in that fight makes people DC.
Jarax, Faction Champs and Twins went smoothly regarding server stability and performance.

Heroics are running just fine. But they also were before. Executus was not hit by "Additional Instances blabla" Except during Friday Afternoons maybe..., so cant really comment on that, regarding if it has been 'improved'.

-Glow

No problems entering instances on Alonsus since the maintenance on Wednesday. Thanks Blizz ;)

Never had any problems on Mazrigos, sill haven't.

Eonar, Arathor, Outland & Kazzak are much much better now.

Overall lag is worse, no idea if that's related or not.

Now I need a different .sig :P

I Just wanna file an update.
The raid-instance server connected to Executus is now working worse than ever before! Thanks for the updates.... Huge lag, Server Crashs, Teleports to Dalaran....
.......
.......
Fix it please :'(

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Q u o t e:

Haven't seen "Additional Instances Cannot Be launched" Since the fix...

Thanks Blizzard :)
Now it's possible to play again :)

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Same goes for Argent Dawn. :)

A big, big thank you to Blizz.

No problem entering Instances - Now you just need to fix the lag in - WG, Instances, BG's - and fix the Disconnect when engaging bosses in ToC 10 / 25 and Ulduar 10 / 25, and problems conserning engaging bosses in ToC 5/10/25 that suddenly disappears. Well that was some of it.

On ED there has been trouble in ToTGC at peak times and certain battlegrounds. WSG seems much worse than SotA for some reason with extreme lag at times, with AV and AB being fine, though AB also laggish at peak hours.

We hit a brick wall of lag two weeks ago in TotGC, where a number of raidmembers dc'd and we were basically playing blind because of the spell delay. After a few wipes and reports from general that some guilds were fine, some had horrible problems like us, we decided to go Ulduar. 1 hour later we went back and the lag was gone.

Overall both bg's and dungeons seem ok, abit laggy, but at least we get into the dungeons. Dalaran on the other hand seems to have worsened for all.

Instances still lag on Twisting Nether on Wednesday/Sunday. And Now our server lags EVERYDAY in dalaran from around 4pm till midnight.