As I understood,
Update 1: add R-77 shooting capability;
Update 2: replace old MFD with MFI-55;
Update 3: install Made-In-China DL
It's a bit confusing to keep U1 and U3, without U2.
My suggestion:
1) if DIS will/can not finish U2, remove U3, J-11A stay as U1, for realistic
or
2) if DIS decide to finish U2, keep U1 and U3, eventually, we will get J-11A U3. Still, it's realistic