Ability to tell bliss to apply to all - the inbox
When Bliss suggests an action in the inbox, for all similar suggestions be able to tell it to apply all.
EG Genre Change from Indie -> Pop Rock all chnages of the same type would be applied.
Same for track numbers etc etc)
(Currently I have 45000 to approve, TuneUp does this for me in iTunes but this is only where I keep a fraction of my music collection)
This is a really good idea and I think it chimes in with http://ideas.blisshq.com/forums/21939-bliss/suggestions/2015043-dry-run in a way. Imagine your first run of bliss showed you all the things it would do... you could click through a few fixes and then say "I'm happy with this", and "latch" it to run automatically.
Also, note that individual rule automation is also dealt with at the rule level. You could vote for http://ideas.blisshq.com/forums/21939-bliss/suggestions/2387358-automatically-rename-genres for your particular problem.