The lack of character themes really gets to me. I can only assume there will be a stage or two that actually plays character themes, much like the Disco stage in DOA4 that always played remixed character themes depending on the characters you chose.
That being said, many of the stages and their stage music are just bad. Too Metal, when DOA has always been about Rock. Too Goofy, when DOA has always been about striking a balance. Too Intense, when DOA has always been about simply entertaining.
Honestly, the stage with the sakura flowers, and the ice stage - are the two only redeeming stages and stage themes. A runner-up for third place would be Flow with a notable mention for Scramble only because that stage has been played to death already even before the game's release.
If the boxing-ring stage ends up playing more themes than just Tina's, good on Team Ninja. If not, shame on them for being so lazy.
Based on the delivery and presentation of DOA5 though, I can't imagine anyone at Tecmo or Team Ninja preparing it to be either the best or the last the series (or even "DOA5") has to offer.