This was what crossed my mind. If I have ideas I only really send out a basic drum pattern, bass and just enough guitar to give an idea of what the chords are. Everything else I leave to the band or people I'm working with.
Also, I'd feel a bit deluged by 24 ideas. If I'd come up with that many ideas (if only !), I'd be inclined to send them out in groups of 3 or 4 - much less daunting for the recipients. Not everyone can come up with parts they're happy with quickly. It can take some time to mull ideas over.