I know this is weird, but I like a car that can understeer (corners badly if you try to go full steering lock at full speed) The case with those cars is that they tend to actually turn better at full speed if you steer only a little, and much better if you take a second to slow down a little. It rewards not being careless.
Maybe it's not in the spirit of Blockland but this is what happens when fans of driving games are the ones making car handling. I don't want the road cars to feel the same as the race cars.