Anti-projectile? I think they're simply trying to be more realistic. I'm not against raising dead bosses from their graves or characters with supernatural abilities (it's still prevalent with the ninjas but not in a projectile-like fashion) but I think the game would just simply play like as if it was DOA4 which is very different from 5/5U.
If anything, I'd like a Dimensions 2 (all characters and unlockable bosses + pre-DOA5 character models for Rig and Mila) again for the 3DS, probably covering up the happenings within the 2 year timeskip after DOATEC was destroyed and before DOA5 started and maybe some history about Rig and Mila.