Interesting that you don't think you need to strengthen your quads when one of your legs is weaker.
Who said that? You're just trolling me at this point, right?
I need to even out my leg muscle, not blindly isolate one side's quad muscles in ways that may leave stabilizing muscles in a less effective state. I need to fix my proprioception so that my body will let me fully use what's there on my right side and so that when I feel like I'm at 50/50, I'm actually at 50/50. I'm not weak right now. I'm imbalanced.
FWIW, I just measured my quads fairly low, just above where you can see the outside of the muscle bulge (it's tricky to get just right), and they seem to be 0.5"-1" different in girth (heh, she said girth!). Not much on legs my size. That's 3-6%. Granted, if anything, my right side should be larger, not smaller. What's interesting is that when I flex or use the quad muscle, they look different. The muscle bulge is more noticeable on the left side.
I've nowhere the knee problems you've described, but have found a knee brace to be useful and psychologically comforting when skiing on a bad knee. Useful, because I got up after a bad fall and the sore knee did not even whimper. Comforting because I was skiing and not sitting on the coach thinking about and watching WC skiing. It's not a crutch because the knee I originally purchased the full brace for is now fine, and I'm using it on one I tweaked at the end of last season. Ligament injuries are a longer, year+ healing process compared to muscles, probably why some professional athletes break down so quickly, they never fully heal before returning to the slopes, field, court, etc.
I'm particularly interested in any special insights you've gained into dirty heel pushing, wide vs narrow skis, and knee pain. I'm making very irregular progress in breaking my habit of heel pushing. My narrow GS cheaters are a blast and they punish me for heel pushing, which is what I expect them to do. My wider all-mountain 88's are more forgiving, but can still be punishing if I don't stay balanced over their sweet spot. Maybe I answered my own request.
I find a knee brace psychologically disturbing ... I've mentioned this once or 18 times already, right? I've had a very bad collision at maybe 8 months out (both of us coming around a tree island, zooming a blue groomer, not paying enough attention) ,and I had a yard sale fall over a year out, and neither hurt my knee at all. It's not something I worry about beyond the basic "are all my parts intact?" check I have always done after a big fall.
My surgery was Dec 17, so it's now just a smidge over 1.5 years, at which point the new ACL should be as strong as it'll ever be. The meniscus is a harder question.
I believe that heel pushing puts unnecessary torque on the knee. Smearing from the center of the foot is probably better. It's a different force than carving, obviously. Maybe shear vs. direct or something like that?
I'm making decent progress with heel pushing - more since I was able to articulate the question I'd been subconsciously pondering - "What's the difference between a heel push and a smear?" - after which I was able to articulate what was actually changing when I felt like I wasn't heel pushing - which was that I was more centered over the arch of my foot. Before that, sometimes I could feel that something was different for a turn or two, but I couldn't tell what. Now I have something I can consciously check in with.
Note: I take lots of lessons. It helps with fixing technique issues. If you want to progress, that's a good bet. Lessons with experienced instructors who can articulate or demonstrate things in ways that make sense to you.
Also Note: some of this pain is very specific to my patella misbehaving, as described periodically in this thread and especially well by SBrown. That is very likely different than whatever pain you're experiencing; it sounds like that is more ligament based.