Read a thread over on IC discussing how adding weatherstripping and sealing up some of the seams can greatly reduce road noise.
Since fixing the car, fuel economy seems to be in-line with what it should be:
I attempted a grid charge, as it sat for close to 2 months, being run only maybe twice in that period. However, it's still below freezing most nights and battery voltage was climbing up to 180v, which is as high as my charger will go, so I was unable to do a balancing grid charge. I'll have to wait until it's a little warmer to get that done.