[@Mahz] Not sure if wholly useful, but perhaps build a suggestion box thing where people can enter suggestions. Preferably it'd send suggestions to you (or your github) in a way that doesn't clutter your PM's (but lets be real, I think yours are already cluttered). It'd probably be some sort of form you fill in, namely a name for the suggestion, a type, a description and potentially an ability to attach images (for ideas on how it should look or illustrations). 

It'd be easier to suggest things and, probably it'd be easier for you to see what some ideas are. 

Currently the suggestion forum is rather unused, lol.