The problem is you get people freaking out about whatever we're pondering, and it puts us in a weird position where we're basically needing to draft PR statements and debate repeatedly over things we're still experimenting with and whatnot. It can actually detract a lot from development time, not to mention turn people off prematurely based on what they see vs. how it actually plays. Extensive debate can also be extremely tiring/draining, and honestly sucks a lot of time for morale. Morale for us basically = productivity. We already have plenty of debate amongst ourselves, trust me.
Talking openly about future balance/design tweaks also discourages people from making the best of the game as it is, as people will just be waiting for whatever's around the corner.
We have a lot of stuff planned here in the future. Most people will like it, some won't. Some will complain very, very loudly. The game will be better in the long run, but we need the ability to buckle-down and do our own stuff right now.
3.02 Should speak for itself anyways. You wanna know what's coming up in the future? A better Project M.
Plus numerous PMBR members are around on Smashboards, and even out there in the tournament scene. We're generally available, even if we're fairly busy.