I think the heavy feel of the wheel is just the little change in the alignment.
As for the height difference, is there any spacer or anything like that above the springs that could have been left out on installation of the springs? I was not there when the shop took out the old springs and we both run these springs. I did check to make sure that the rubber springs isolator was reinstalled and it is there. I have a feeling that I just got a set of short springs. Being they are a 1 inch increase over stock, now I am worried that if I go mid perch then I will be at +2.5. I am worried I will have CV issues at that point.
All I can tell you is I run on mid perch. Another member on here has been running mid Perch for well over a year with over 17,000 miles. He has a 13 and mine is a 14. Neither of us have experienced any issues. He admits not running 4x4 much but neither of us have any bad experiences