He and Jobs made a great team - I'd like to imagine that they had many "full and frank exchanges of views" as part of the design process.I question if Jony really cared much about functionality and usability.
However, the MM2's charging problem is that it was a lazy re-working of the original AA-powered MM.
Personally - charging port issue or not - using a Magic/Mighty mouse of any generation for 5 minutes makes me want to gnaw off my own hand - but I'd put that down as subjective, since some people seem to like it. The only machine that forces the Tragic Mouse on you these days is the iMac 24" and I'd seriously recommend taking the option of a cut-price Magic Trackpad instead (...and buying a 3rd party mouse that fits your hand for those times when only a mouse will do).