For skoob, if you're referring to the mod that deletes the grid characters and banners is called wipeout, i think i left a link in the discord.
For solonese, for the price cars, the best solution for that is to install the hidden car mod, the only downside is that deletes all the event restrictions.
For the price cars, im planning to put an unique car, my main issue with the 3 price cars is that they have a works conversion, which is not reversible, that and because 2 of the 3 cars were in an inferior class at start, heck even the s2 elise is almost (if not) in the b class, so the main plan is to put mods of a same brand without works conversion to replace those
And for the Cars, the main thing that comes to mind to the steering is the settings, here i posted a baseline with adv settings for keyboard and controllers, since because the new tires some base settings were destroyed, if is not that then i really didn't understand your issue, and tbh selecting a gt3 imo is the worst baseline since after some reworking (in progress) they are less grippy that i thinked before.
Anyway, maybe the issue of modified cars are the extra grip/power, making it more homogeneous during this phase, only to be more unique again during their phase 4 (fully upgraded) and phase 5 (works conversion)