I get your feedback, I am just trying to find the culprit(s) why i keep having about 30 fps, first think I did indeed checking with Mesh info and unsubscribing to everything with a weight in the red. This did not fix to issue, I'm still going through my mods. In the meantime I can conclude that unsubscribing to all assets did not fix the low FPS issue, so excuse me for my comment.

Funny.. Unoptimized? In relation to what? Vanilla stuff?
This is a prop version of the functional highly detailed vehicle model, so model is 100% the same.
If you care about vanilla and all those optimization weights than keep using vanilla stuff, if you want some more detailed stuff in your cities, then it's actually weird you are following 2016ish rules related to vanilla models. Simple as that.
Use your eyes instead of that outdated tool, and see if model is looking good and what triangle counts it has. Low weight and trash looking, high weight and good looking or even high weight and trash looking - your own choice, since workshop is free and not paid. In the end, don't try to act as smartass, telling others what is wrong when blindly following Mesh info tool only.
/Rant off.

Unoptimised. Weight of +500