The main trails affected are these ones:
Labyrinth Rims and Gemini Bridges BLM closure - FunTreks
The change to Hidden Canyon is irrelevant to that trail though if they closed what I suppose that they did, it was a nice dirt road with some minor water crossing. No idea if that is what they closed.
I cannot picture the change to Deadman Point but I do hope they left at least one of the major overlooks open, those are great.
Mashed Patatoes: that closure will irk hardcore folks, for sure
Bull Canyon, as long as portions of both rays remain accessible, that's not a big deal but I fear they closed a short fun section on the left. Hard to tell, it has been 10 years since I drove that (in my Outback, ha!)
Overall, doubt that more than like two dozen folks total in 4R will feel the changes. Jeepers will indeed be livid about Hey Joe and Mashed Patatoes but the rest are minor changes.
So hard to tell what the impact on lesser known trails is. EIther away the mileage affected is huge which may force even more overcrowding elsewhere, leading to even more closures....