The most important thing for jh7a2 is that expanded weaponry selection. Unless we get images of various stand off guided weapons like:
cheap short range satellite guided bombs (large/medium)
cheap short range satellite guided bombs (small form)
slightly more expensive winged satellite guided bombs (large/medium)
slightly more expensive winged satellite guided bombs (small form)
medium price / medium range optical/radar guided winged bombs / missiles (large/medium)
medium price / medium range optical/radar guided winged bombs / missiles (small form)
satellite guided medium range cluster bombs
medium range stealthy bombs/missiles (unitary and cluster variants)
long range stealthy missiles (unitary and cluster variants)
compact anti-radar missiles of long reach (so a JH-7 can carry at least 6 of those)
then the upgrade is not going to amount to much. So it's not really about the plane so much. J-16 or J-10 could carry all these. It's about the next generation of weapons coming online.
Some of those weapons most certainly are not standoff lol (the first two "cheap short range guided bombs").
Personally I don't think we know what on earth the JH-7A2 is even meant to be and what supposed upgrades it has. In fact, have we even had any pictures of the JH-7A2 supposedly on display at Zhuhai this year to see what it's fitted with?
As far as new weapons are concerned, I think 2/3 of the list you described can be summed up as:
100kg, 250kg and 500kg PGM families, with or without wing extensions, and with or without certain additional guidance modes.
But we all know that the PLA doesn't seem to have committed to a family of direct attack PGMs in large numbers yet.
The others, being a stealthy stand off missile, and a new ARM, are of course awaited, but not exactly JH-7A2 centric.
But even without new weapons, there could be some iterative improvements to the JH-7A to let it keep up with modern times a bit better... even if it isn't anything as dramatic as an AESA radar upgrade.
I'd also add that the description of the JH-7A2 at Zhuhai is very vague and may or may not mean what we think it does as far as the extent of expanded weapons compatibility.