ya my reach is ~8' in shoes, definitely helps. Wish it was like 8'6" though... lmao.
you keep mentioning this quad dominant stuff.. i dno, it doesn't seem to me like you're hitting your hamstrings/glutes enough? I just get that vibe.. if this quad dominance you have is somehow really a problem, you could focus hard on your hamstrings/glutes. I personally am very happy for my "strong quads". If they were somehow so strong (or p-chain so weak) that I would consistently get knee/tendonitis issues in my knee when jumping, I would make sure they are actually strong enough & that's not the reason for the knee issues, jump less frequently, jump with less intensity, sprint, and target my p-chain hard.
pc!
I've been ignoring/stretching/foam rolling my quads and hitting glutes/hams hard for more than a year now. Only deadlifts and leg curls recently though. I think the best exercise for glutes would be the hip thrust, but too bad I can't do it at my gym. Yes, strong quads were definitely a good thing back when I was a RL 2 foot jumper, but it was terrible for me when I started trying to change into being a one foot jumper.
Not sure what you exactly mean about the last part, but yea, I'm guessing if my knee keeps bothering me I'll have to jump less or even stop jumping at all, start sprinting, and keep hitting my posterior chain.