I feel like the wanted system is pretty good where it's at, but I do feel like warrants for arrests should start at 3 stars
If you look in the base game, the wanted level scales up slowly in terms of aggression towards you (E.g. One star in SA= one or two cop cars, no shooting just yet, 2 stars= up to about 3 cars and shooting stars 3=Helicopter)
With warrants starting at 2 stars pretty much any minor crime you do can land you in jail. Hopefully a small and wanted change, 2 stars should be increased fines from 1 star so the system would look like this
0 stars: Innocent civilian
1-2 stars: Minor offender (ticketable)
3-5 stars: Minor/Major felon (warrant+arrest)
6 stars:Most wanted (takedown authorized)