Honestly, while we may not have special character entry and victory animations, Smash does them justice in... literally every other area. Besides, considering the care that goes for each franchise in the movesets, stages, items and Spirit battles and how much work all of these take, not having some character specific interactions in exchange for all of that is a pretty sweet deal imo.
Ah, here's something I've been meaning to ask: what other japanese developers could get a playable character besides Koei Tecmo?
The ones that come to my mind are Level-5, Arc System Works, maybe NIS (big maybe). Who else is there?