No there isn't. The game comes out in just over 3 months. They're not going to rebalance the entire game, an overhaul of system and characters both, at this point in time.
Considering how quickly they changed it from E3 2012 to launch (September 2012), it's about the same time frame that we have here and may not be completely out of the question. At the very least though, they could still use the results of this debate to change the game post-launch. That way, even if they do have to release DOA5U with the DOA4/5 stun game, they could at least still change it to a more DOA2/3-ish system after launch.
I missed out on the glory days of DOA2 and DOA3, but even from just watching videos 3.1 and 2U and reading what all of you vets have said about it over the past year, I completely agree that the old system seems to be much better and more solid than the current one. People tend to dislike DOA because it's too random and guess heavy. Bringing back the old system would likely get more people to actually give a shit about DOA and help the community grow. Certainly no bad can come from that.