I agree that there isn't "significant" tree work to go. I think Gil's comments in the video are dated by the fact he hasn't been back in a while. The trees are no longer the priority at this point. Yes, we can keep nibbling along the edges in a few places and we could pull back on the left of 6 and 7 and we should probably trim more on the sandy hill right of the 9th green to give the green area more daylight. But the current situation versus the construction images isn't far off. Andy's video from October of 2018 includes the tree on 10 and the three left of the burn on 6 that are NLE. And there will be yet more work this winter.
As mentioned in the "OMG Yale" thread, there is still relatively minor green expansion needed on holes 1, 2, 3, 4, 6, 7, 8, 9, 12 and 18, but they are mostly just an extra pass or two or three of the tri-plex. (Yes, the third hole would require rebuilding the double punchbowl which wouldn't be that difficult.)
There is only about $100K in pressing drainage work remaining on the course, notably the last 100 yards of 18 and a few other places like 6. The bunkers, of course, could use the full re-do, especially those on the front nine. If I were to prioritize bunkers, I would begin with greenside on 2, then greenside on 7, then the ones around 1, and then 6 and so forth, like 4, 5, 8, 9, 12, 13, 15, etc.
One thing we could use would be to aerify the fairways for the first since 2009.