So I just got my car back from my mechanic after gettin everything new in the suspension but springs/shock as well as all new frozen rotors/ss lines/ pads. I initially took the car in the tight up the steering and to stop the steering wheel wobble that happens on the freeway. So everything feels much better and it is certainly much tighter. But I still seem to have a little bit of wobble while on the freeway but I can't find exactly why?

I have 20" wheels and there nice but of course there mainly just for show.the rear passenger wheel has a pretty big dent from a pothole and actually causes the wheel to slowly leak but still holds air.
Would a dent like that cause the wobble?

yes swap to stock wheels and see if vibration is still here ... it very well might be that wobble is couse by the wheel...

You may want to look into getting that damaged rim either replaced or fixed sooner rather than later. It may cause the tire to blow out or dismount at speed. A bent rim, front or rear, can definitely cause steering wobble. This is especially true if it is a "pretty big dent" as you described.

Which frozen rotors did you get slotted and dimpled?
This probably has nothing to do with the source of your wobble. Just wondering which ones you got.

just slotted; i think they look nice. I'm still breaking them in but i will let you know how they feel once i put a little more miles down.