Lets wait for the next up-date to prove that there is hope first.
About GT:
+1 for 600hp+ GT1 class. Some people did that before using tweak, but adding more cars instead of creating gap with tweak / handicaps would make it much more realistic.
Re: monzta
Were you talking about A8 / Manufacturer class ? If yes, we need things like e-LSD before adding those machines..