That's okay, I like surprises anyway. Oh, forgot something. How will you refill the LPG variants? I don't think any official map has LPG fuelling stations, just petrol and diesel (and electricity for EVs)
So you add the vanity part that may clutter up the mod , say you don't wanna have the vanity part as a separate mod, then make the traffic version, a VERY usefully (and usually hidden) feature that is included by default in every other car mod that has them, as A SEPARATE MOD!?!?!?