Indicators maybe for freeroam use it like Driver(?), indicates automatically at your next turn when a gps route or mission route is active.
Bring in all the vehicle pesonalization from other games like underground 2, midnight club etc. Lights and Neons, trunk/boot layouts, hydraulic suspension, interior customization, bodykits for ALL the cars, needs waaaay more options for customization, but the bodykits are run with licenses just like all the cars are used under license. Would be a good idea tho.