I don't know how much work would be involved in adding these features,
but I am certain some have been requested before.

program features:
Volume controls for voice tracks of actors,
a basic Equalizer for all audio tracks,
adding RGB colour space based editing for sprites and actors,
internal sprite editor to make minor changes to sprites,

content:
more comic character types, and alternate sprites for them.
more stages and comic sets.
some more small business oriented stages (like garages)