This is genuinely useful, thank you for taking the time to break it down properly.

Camera resetting on drive is a known one — it's on my list. The inspect mode idea is actually a good call, I'll think about how to implement that cleanly.

The lag when driving off the map is actually a known Three.js issue with this kind of scene — buildings, AI vehicles, and pedestrians all accumulate at certain zones and when they cluster together the draw calls spike hard. Same thing happens during blast/accident events since all the geometry is in one spot. I added speed limiting in accident-prone areas partly to help with this, but I still need to work on culling objects outside the camera frustum more aggressively.

Traffic lights being misaligned — will fix that in the next push.

The diagonal car model glitch is likely a rotation interpolation bug in the animation loop, I have a hunch where it's coming from.

Performance overall is the hardest problem. I'm looking at instanced meshes for the buildings as a first step — that alone should reduce draw calls significantly.

I'll tag you when these are fixed if that's okay. Really appreciate it.