They have appeared to “fix it” on the Harbor side, as much as they can, with 33 different (numbered) lanes and metal detectors (the metal detectors sometimes are for a pair of bag-checkers). This is a recent change that hasn’t gone through any crazy crowds yet, but so far it’s basically eliminated waits there as far as I’ve seen.
I’m sure there will still be times that it backs up, but it’s light years better than it was.
We’re rope-dropping tomorrow, so I’ll report back.
ETA: I haven’t see a 10am opening in ages. I think they’ve fixed that, too. (I’m in total agreement that Disney should never open at 10am.)