The fermata can be made to override all other tempo considerations
The ability to right-click a fermata (or caesura) and choose "no playback effect"
The automatic updating of all vertically-aligned fermatas (or caesura) in the score to match the timing selected for one.
The ability to attach a caesura to a specific beat (the beat where the tempo resumes) and have its position default to a certain distance left of that beat no matter what rhythmic changes are edited into the score later on
Fermatas on the final note of the piece don't have a weird, early cutoff during playback like they seem to now