A 17ah option would be nice, but I can already get 100kms with my 11ah. Having said that, a lot of my riding is in level 1 and with a 17ah I could probably ride (a lot faster) in level 2 or 3 and go the same distance.
Fender mounts would be really nice. I'm presently looking for a set of fenders for my Ridgerider and it looks like I'll have to do some fabricating to get a set of generic mountain bike fenders to fit.