I think I’ve just replied to your contact form submission, so sorry if I’m repeating myself!
I have updated the getting started guide with a little more information on analogue inputs. I also hope to put together a datasheet containing the technical information soon.
The DRV8835 (motor driver IC) can handle up to 1.5A per output. It also has over-current protection and thermal shutdown so will easily survive short circuits etc.
You do need to watch the start-up current draw though, this can cause a voltage drop which can reset the Crumble (but not damage it).
All the best,