I've now completed 2 round trips from DXB since March started, and was able to sample Y (x1) , J (x1), and F(x2) cabins. Some observations / me being nosy with the staff:

• Loads are pretty full in Y in all flights, most people are in transit. On my most recent flight in J, there were 3 pax (of ~300) whose destination was DXB, me included.
• Many people are moving or outright missing their flights. The manifest showed 40 in J, 25 showed up; 7 in F, 1 showed up, 286 in Y, ~220 showed up, etc.
• I haven't done that many F flights, however on both my flights the attendants mentioned more than once I could have a glass of wine from the J cabin as well -- not sure if they were pushing for it as they loaded lighter on the F wines, there was only one bottle loaded of the Poyferre which I drank fully about 3 hours in. The menu is also no longer bound in leather but thick like a magazine.
• There seems to be a shortage of F men's pajamas ? Both flights (MXP-DXB, DXB-KUL) only had women's pajamas (without the hoodie pouch) so I had to size up. I was 1 of 4 F pax on MXP-DXB, and 1 of 3 on DXB-KUL.
• The DXB F lounge in the B gates has become the only EK lounge (J+F) in the B gates -- the J lounge is closed & guarded (pics below). Within the F lounge, a small subsection consisting of the dine-in area and 3 couches + 6 armchairs (I'm not joking) are reserved for F passengers. If you are in F, you can also seat yourself anywhere in the J section.
• The DXB F lounge food to order is closed 2am - 4.30am for cleaning -- again, not sure if this is because it was Ramadan, because it's reduced service, or if it's normal. The buffet remains open during this time. Perhaps someone who is a regular in the F lounge can advise?
• DXB public seating areas & PP lounges are bursting. I walked past the C gates PP lounge and heard passengers being told 1.5+ hour long waits. It seems many people are showing up 6+ hours to the airport as they expect difficulties leaving. In the terminal, people are camping out on the floors next to their departure gates, however for unused gates the seats are empty.
• As an update on the train to the C gates, this is not the case -- the sign in the J check-in area pointing to the trains actually just points you to the long walking route that merges with the Y passengers going to the C gates.
• Although I upgraded to F from J Flex, I was given F Chauffer Drives (the BMW 7 series) on both pick-up and drop off from/to DXB. Both drivers mentioned that they were busy doing drop-offs, and that pick-ups were very rare.
• Gates B10 - B20 (ish) are hoarded up on the even-numbered side of the terminal.
• Fix Chocolate (originators of "Dubai Chocolate") finally have less of a line, if that's important to you.
• I was told that if a missile alert happens, all passengers are ushered to the ground floor away from the glass, however during the times i was there, I never received an alert, so I cannot vouch for its accuracy.

N.B. will add photos later today -- left the phone with pictures at home !