Do you know exactly what each hack does?
I can answer this a bit better now having done more research. It's a class-overhaul of the SFC version and adds maybe 3x the amount of jobs as the original. There are classes taken from FFT, Ogre Battle, and elsewhere. yes, that's Agrias Oaks as the Holy Knight and you see the Valkyrie Profile lady in there too. It also rebalances classes and combat, and adds a lot of new things. For instance in rain bow range decreases.
CV2 is the entire package, but he also has each feature split up into separate patches. He also aseparate bugfix patch.
Do I know every little change? No because I don' think that's documented everywhere, including in Japanese. The project page is pretty vague.
List of the advanced jobs (the fansite it's taken from seems to have vanished):https://imgur.com/a/QudmQ
This is the pastebin of the DeepL translation of the project page:https://pastebin.com/WHAk8V44
At this part of the video he spends 7 minutes going over the features:https://youtu.be/AK-DksJn0TA?t=12997
One of KT's mods for Ogre Battle has already been submitted:https://www.romhacking.net/community/3719/
Partial list of features:https://gamefaqs.gamespot.com/boards/999440-tactics-ogre-let-us-cling-together/73267101