Yes to the first question, a 2.0 update is coming out. Previous posts in this thread have talked about it if you want more details, or you can go through the dev's Ci-en page if you know/translate Japanese.Is this game getting more animations later or why am I seeing them post more animation on Ci-en? Also is there something we can do to avoid the gallery finishing the animated scenes so fast? They should be looped with options to cum or finish animation.
As for the animations, they can happen very often during a fight. So perhaps they didn't add features for it since they didn't intend for players to just sit there and watch. They are basic video files though, so you could use a Unity asset viewer and dump all the animations as an mp4. Probably the closest you can get to watching it on loop. I did think it's weird there wasn't a standard h-game gallery where you just watch animations on loop and you click to go to the next stage until finish.