So Illuminate is now a Keen Eye clone. Fun fact: This means Watchog now has two duplicate Standard Abilities.
Pff, amateur, Delibird did this first, and better
Aside that, I would assume that we're looking at 1 new move per type (so 18).
I'm not sure all of the IoA moves will come back. I'm more of the idea that only some will (most likely the ones that actually saw usage in competitive and are currently lacking in learners, most notably Flip Turn, Triple Axel, Dual Wingbeat, Grassy Glide, Rising Voltage, and Expanding Force. Maybe also Misty Explosion just for the sake of keeping all 4 "terrain" skills, and Scorching Sands). I don't think they'll bother bringing back a TM for say, Skitter Smack, or Steel Roller, which had basically 0 or near-0 usage...
To this you can add certain main utility moves missing (maybe) like Scald, Knock Off, ...
Edit: Also one other notable thing, being 30 TMs, I wonder if we can get a estimate of how many pokemon families will be in the DLC... Idk if there's a specific pattern in how materials are used on TM crafting, but I would assume that every material shows up in at least 1 unique recipe, so that'd mean there's at least 30 non-version-exclusive non-legendary families coming in DLC1?