I think the Soul is a really good contestant to receive an electrified powertrain...but those charging times will be problematic, as will the leisurely 12s 0-60 time. 5 hrs on 240v means that on a household plug, the thing will likely take over 10 hours.
I'd like to see battery tech match what's commercially available rather than what other auto manufacturers are using.
Toyota's Yaris Hybrid-R concept is what I'd like to see be more widely used, as well as the new Accord Plug-in Hybrid's. As far as fully electric, I wonder if you could do an electric-electric hybrid: slow-drain battery supplemented by a capacitor "boost"...means you could use a weaker electric motor (75hp/150lb ft) but with up to 10s of electric capacitor boost, the car would be spritely but very, very efficient.
Then again, I'm not engineer. Still, I'd have to think there's better tech out there than just throwing in a giant battery.
I loved BMW's idea to put capacitors in the vehicle's exterior panels...let's keep that kind of momentum going!