Well to the wonderfully horrible clipping issue.
Complaints about it are all over the "dead" forums.
I do a lot of work with 100's of acres sites and large satellite groundplanes. Clipping is the bane of my existence.
Often time, I have to have two models, one with everything and one that just has the part of the site I am currently working on because clipping is so bad. Lots of component reloads to get the big model updated.
I know that other large site softwares display no clipping (Vue, for one) and I have never heard one reason for why Sketchup does clip. I would not hold your breath for this issue to be fixed and figuring out good work arounds is your best (only) bet.