Well, if gas is that cheap, yes, that could make a difference. But getting 20% cash back on all charging, including the monthly fee (which works of you drive a lot and use only public charging, if you don't, it isn't worth it). Also, keep in mind my cheapest home electric rate is $0.22 per kwh and cheapest gas here is $5 per gallon. So my numbers work out a lot differently. Best cash back I can get on gas is about 2%, so it makes a big difference there as well.
Also, is it fair to compare to your previous vehicles or to one comperably sized?