Well, nobody is brave enough to do such a thread, because the first 10 pages will be about how much devs suck and that everything is shit and the remaining pages, before the thread is locked, will be a random flamewar.
Well, it is true that players know the game from the other side than you and it can be valuable for you.
For ex., if you would said about planned upcoming AC cap removal, problem with 220AC trolls could be discovered (and i think most probably would be discovered) before even implementing it ingame - cause everyone would start to check by using FCP what kind of chars you can possibly build with this feature and you, devs, would be warned - less time wasted.
I know that you got your own ideas etc., but sometimes its good to have someone who look "from the other side". Isnt your purpose is to make this game as best as it is possible?
Its you working on this game and its your child, nobody can tell you how to raise your kid, but if you will start keep your child at home isolated it will become weird and sociopathic.
But beside this, there was a time where we communicated such stuff on our blog.
Whats the problem with getting these good times back?
About trolls and flamers: well, Moderators should delete every posts that dont bring any ideas and is made only to flame and whine.