I can confirm battery light (other lights) flickering and this is normal.

Re the pedals, yes the throttle pedal can be stiff and the clutch heavy and low too, I think this might be normal?

When going for full throttle I really have to push the pedal hard, think they are just heavy?

ETA would like to see some pics of the car, I thought about the one you have when I got mine, but was put off by the black wheels, does it still have them?