I guess the only thing we can do is hope that things get better come TRS26. But given N3V's track record. I'm not optimistic.Your graphics settings are nearly the same as mine. The difference is I set my post processing to high instead of ultra.
SP6 is awful laggy in general. I think it has a lot to do with their new graphics system, which I can't remember what it's called right now, that turns everything into flipboards.