I understand the issues that unnecessary complicated (with excessive tris), poorly made LOD2 cause to mod players.
Since I get the point of what LOD2 exactly do, although it takes time I'm trying to build it properly.
I believe 80-90% of mods can fit to 1k or 2k tris on LOD2.
But I can agree with @Drifteris
My PC specs are pretty outdated and I don't have much FPS (~50-60) on multiplayer on Rockingham for example.
But still.. I think that 8k tris limit for LOD2 it's OK and gives freedom to mod creators.
I think current 8k limit can be useful for vehicles those have extras like: roofrack, pushbar, lightbar, spoilers, driver shape for bikes and so on.. They are like outside of the car body shape and have to be visible from distance and create a proper shadow.
Maybe i'ts more up to mod reviewers to require sensible mod build from creators and better standards before pulishing it as I notice they do in last days.
Mods can be updated after they are published and approved. I had seen on custom access mod real life logos added after publishing. All kind of stuff can be messed.
Idea to add something like 'Report mod issue' button in forum, side of comments, where forum users can (anonymously for other users) report serious problem with the corresponding mod. For example: ''Undriveable on wheel'' or ''This car have no shadow''.
Mod reviewers can see these reports and are they relevant and moved to 'Changes required' if is needed.
I hope all of that makes sense to you. Cheers!