Ok, I dont recall reading this in the release notes on Mod5, but if it was included and I simply missed it, then I apologize.
Noticed last night that the caster AOE spells, such as cloudkill, firewall, etc no longer work through doors. It worked Wed but no longer since the update. Tried various spells and had another member testing it as well and none work anymore. Now I am not complaining as in some ways it was a cheap mechanic to some people, but it was a very common thing for people to do, so I am bringing it up in case others havent noticed yet.
We did notice that this only occurs when a gate is initially closed. If the gate is opened and then closed again, then the spells will work through them, but usually that defeats the whole purpose as the mobs are able to get through at that point. However, maybe it worked because the spells were already going and opening and closing the doors allowed it through to start working, as opposed to being a bug or something.
In short I simply don't know what the intended change and function is for this, but it has changed.
I do not want to go crying "stealth nerf", as I havent yet started digging deep to find mentions of this change by Turbine, and thus will not say it is such. However, as this is a well known and well used tactic in the game, purposefully making this change and not mentioning it is a little annoying to me. Granted I am not complaining if the change is how things should be or not...doesnt matter to me. It is however an alteration to a widely used machanic/tactic and thus any potential "conveniently forgetting" to mention it, doesn't really seem to likely to me.