I would generally prefer animation, but it usually is more work intensive to create so if by using still images devs can put out content more quickly I am fine with that.
There are a lot of old strategy games that i would really see modern remakes of. Back in the day not only the graphics were lacking but because of technical limitations there were usually some problems with pathing/ai and max units on the screen.
Most interesting would be a remake of Star Wars...
its alright if it is a main part of the game like in the HuniePop games. But having a random minigame in the middle of an otherwise normal VN is jarring.