This is probably a bit outside of the pale for this project...but here goes.
With so many comic releases coming from DCP in large packs of files, maybe there could be a "Browse Rack" function in the program.
"Browse Rack" would show the first page of each .cbr archive in a folder and opening the .cbr file if the user clicks on it. Effectively, this would show the cover page of every comic in an archive and let the user browse by cover.
Again, apologies if this is unwelcome suggestion, but I know I've always wanted something like this in Cdisplay.