new settings for delay and reverb

[Firebolt391d]

I would also like to only have reverb on certain, selected parts of the song, whether or not that's possible, idk

Yes, now with the event markers, this is possible.
Right-click the bar at the top of the editor where the measure numbers are to begin creating an event marker. More detailed info about this can be found in one of LucentTear's guides I think.

Unfortunately though the delay/reverb do not (yet) have their own slidebars, and it is uncertain if they ever will.