How did we get from talking about a Honda S2000 (by far the nicest looking car I've ever owned) to arguing whether the Prius or the Leaf is better looking? I'm sorry - and I'm sure others will disagree with me here - but to me, they are BOTH ugly cars. Beauty is not the attribute on which these cars are sold.
I don't think the Leaf itself has to change all that much - Nissan should instead branch out. They've already shown off the Inifinti LE, the eNV200 van and the ESFLOW sports car. If all of these came to market, it would really extend the reach of their electric powertrain - much of which could and would be shared amongst the cars (most notably battery cells).
While I would love to have a nicer looking Leaf, it's not what seems to be really holding back this car. In my experience, people I talk to are only really concerned about two things - range and infrastructure (i.e. range). The silver lining there is that education really can and will go a long way.