IMO setup changes, weather changes and so on should be disabled in hotlap mode. Sure, alltho it is a bit stupid, then we know everyone is racing the EXACT same thing. That people are able to tweak temperatures to find max benefits, tweaking the traction controll, tweaking the car... it just gets too silly - alltho it's perfecly acceptable.
Fixed setup, both cars and track wise, and we can truelly start to call it hoptlaping.