Hey!
Sorry to hear about your issues!
First off, how have you come to the conclusion that the TFL is weak/strong and that the glutes are weak/strong? Are we talking glute max or med/min? You seem to know what your’e talking about about so I won’t elaborate but feel free to ask q’s of what I mean!
What type of work have you been doing with you’re glutes? Having been a powerlifter I find it hard to believe that the lack of external rotation in the left (non operated) leg is due to glute weakness. More likely a severe tightness in the TFL or some type of ”mechanical” issue.
/Eric
www.nordicathletics.com