I think the removal of the 90 specific stuff is just that.... the vehicles are working a range of routes so it's a bit superfluous and even if they remove the interworking with the 75/76 when normality returns, it is more flexible with a pool of vehicles for the 90/91/92.
They are cracking on with the repaints probably because of the unique financial position and the reduced vehicle requirement at the moment.
Having had a rare trip into Bristol today (medical appointment not a jolly) and saw some interesting bits and pieces. 66734 expired on 72A opposite the bus station entrance, 69253 hard at work on the 72A too, 66723 on the 93x (I think), and one I've not seen before but might be common, an e200 (44520) on the 72.
However, one thing I hadn't realised is that whilst 37757-67 were refurbished for the 24, I passed 37770 on the 92 and whilst it is still in Urban, it also now has
@Private Baxter favourite green and blue seating too.