I wasn't originally gonna post this because I'm sure most will just pull a couple lines out of context and go "Eugh, how dare you want anything but DOA3 with better graphics! Petition TN!" but fuck it, I'm gonna say it anyway:
Couple things to take into consideration. First, it's obvious that they're listening to the Japanese community first for gameplay mechanics, and they always seem to take precedence. We can suggest certain move properties be tweaked (and sometimes they are) but ultimately the "big gameplay changes" that many here ask for just aren't gonna happen. No holds out of stun? 3 hit CBs for all? I just don't see it happening. It's not the game TN wants to make, it's not the one the Japenese players seem to want to play, and it isn't going to be the one we'll get. With things like hairstyles or w/e, they don't have to choose per-se, so the likelihood of success is higher when asking for such things, and thus it is more logical to do so (see the study on "why people vote" for better emphasis).
Let's put this in an analogy to demonstrate: TN makes a sculpture of a half-nude lady. When you press her hand, she lifts her arm and raises a rope that makes a bucket emerge from a nearby pool with water in it so you can drink it. The Japanese go: "Oh, shit. Best well ever! Let's drink from this! Oh, by the way, any chance you can make the rope a chain so it doesn't break and is more sturdy?" Then the Americans/West goes: "Yeah, this is lame. You should have made a catapult, instead." Then the casuals go: "Sweet! Oh, but can you make it so we can put some different hats on her and there's an iPod home built into her side? Whatever liquid you want is fine. Functionality-wise I trust you guys to make what you will."
So, who is TN going to listen to? Japanese, Casuals, then Americans. That's why people ask for what they do. It's true, casuals don't often ask for gameplay changes... and that's good! I don't want a bunch of casuals making the game. Fn' hell, it'd be a mess! So let them stick with what they know.
End note: This isn't meant to support or diss any proposed gameplay alterations or existing ones. Just my take on how TN is going about their business.