No offense, but MK sells just as much on its aesthetics as DOA does. It's camp gore instead of camp boobs, but it's a similar principle.
Now, what you're implying here if I understand you correctly is that Ed Boon "gives us what we really want" (when DOA implicitly does not), and this could mean two things: 1) "Content" and 2) Gameplay (as most other things can be lumped into aesthetics).
1) Both DOA5U and MK9 has plenty of nice, useless extras features. Watch Modes, Test Your Might, Combo Challenges, Stages, Unlockable costumes, Story Modes, yadda yadda. DOA has the added bonus of all the move properties and frame data being in-game however, and it's tutorial mode is much more complete and exhaustive. So for me, DOA has it better.
2) If you like MK9's gameplay better than DOA5U's that's fine I guess, but both do what they set-out to do: evolve their franchise's fighting system while also keeping it true to the style that fans fell in love with to begin with. Now if we're talking a balance thing, oh my lord. I may complain here and there about DOA's balancing, but MK9's is insane! At least DOA doesn't have any 9-1s.
Anyway, I just don't get why some people like to ride Ed Boon's dick so much. Same thing applies to Itagaki. Both headed some great games and they deserve respect for that. But they're not untouchable messiahs. They both fuck up and they actually fuck up quite often.
In my personal opinion, if Ed Boon is no more or less capable of giving they audience what they want (or as you strangely worded it: "needs") than Tecmo/TN with DOA.