Turn into Tekken? I'm guess you're referring to DOA's juggle system which IMO is quite lenient compared to DOA3.1 where slope infinites existed and Bass could possibly kill you with a death combo.
I was referring to that, but also keep in mind that 3.1 was just a japan exclusive edition of DOA3, a niche game at best, compared to the overall series.
But I'm also talking on the whole. Mechanics, aesthetics, presentation, attitude. Think about how it went.
Originally, it was "No fanservice, we are gonna be a REAL tournament worthy competitive game, like Street Fighter and Tekken, and MvC!"
Then they backpedaled on some of that with the usual focus on fanservice with the dlc, then the patch that some people will argue removed certain "competitive" features (character tweaks, removed some loops, etc, etc). Now with DOA5U, they are bringing back a lot of the old DOA focuses, like music, stages, costumes, characters, as well as apparently tweaking characters even further, bringing health back up, etc, etc.
It just really seems like they are bringing DoA back to it's "Stylish Casual Fighter" roots with DoA5U, or at least, trying to, as opposed to what DOA5 tried to be, which is "just" a tournament fighter.
I'm all for it. I used to love DOA for its presentation as a "fun, fluid fighter". DoA5 had some mechanical improvements (Less counter damage, sidestepping though useless it may be, etc), but overall felt like a terrible DoA game. Just that it was trying to be/imitate Tekken (Right down to the color scheme and grungy menus...).