A few months ago I posted here about my frustrating, stalled recovery. I was given some good advice, mainly that 1) I'm not where I should be with strength and 2) I should consider a new PT.
It's now been ~14 months total (2 months since I posted) and I'm really pleased to say that things have turned around since then!
I first got a referral to a new PT. He immediately pointed out that I wasn't doing the exercises I needed to be doing at my stage in recovery. He said I needed to be doing harder stuff, and most importantly focusing on single leg closed chain exercises. My weighted leg raises and quad sets weren't enough. Unweighted bodyweight squats weren't enough.
He gave me an exercise which I feel really turned things around for me: Bulgarian Split Squat. It felt really difficult but not painful near the graft area, just more soreness if anything.
I would say within 6 weeks I was able to walk downstairs pain free. I've been keeping a pain diary and the improvement is really noticeable. Most activities are pain free now.
It's not all perfect - still a lot of stiffness and some general soreness. My lateral step-downs are still very limited; one step-height is about the max and very shaky. Snowboarding is probably another 6+ months away from being viable. But I'm getting there.
Anyway, just wanted to report back, send thanks for the good advice, and give some hope and pass on the positive vibes!