I bumped it up to Octo-Magic but oddly it doesn't seem to work for most and still only casts 4 times; it seems for you though it's getting the 8 casts but has the wrong name.
The reason that battle uses Cloud's name is because renaming a character also resets other information about them such as their sources used, so I wasn't able to rename them and then offer the player the chance to rename them back (some players use custom names so I can't just rename it back to Cloud). There was also a link to Cait Sith where renaming Cloud affects him due to Cait & Young Cloud sharing a slot. The battle also does use a Zack battle model for that part but I suspect model mods override it.
The latest update of Finishing Touch or Cosmo Memory (hard to say, as they both got an update) fixed the spell name, so now both the spelling and 8x effect are working correctly for me.
I was able to make Zack battle model appear by moving the Ninostyle Battle mod just below New Threat 2.0 on the priority list.
Has W-Attack (2x-Cut) been changed so that it no longer targets the person you selected? When I try to use 2x Cut, the game targets all enemies, and then the character attacks two random enemies. I unequipped all the Materia from the character to make sure they don't have anything that conflicts. I gave Cloud nothing but W-Attack (Masamune as a weapon), and he still wants to target everyone with 2x-Cut, and the same for Tifa with nothing but W-Attack (Premium Heart as a weapon). Is this a bug or an intended effect or a problem with conflicting mods?
Here's the list of mods I'm using again: 60/30 FPS for NT 2.0, 60/30 FPS, Project Edge/Team Avalanche Remodeled Fields, Tsunamods: SYW Unified Field Textures, Avalanche Arisen Battle Textures, SYW Unfied Battle Textures, SYW Unified Spell Textures, SYW Unified Minigame Textures, Finishing Touch, Enhanced Stock UI, SYW Unified Worldmap Textures, Cosmo Memory, SYW Unified FMV, Ninostyle Chibi, ReMusic (NT compatibility), EDMusic soundtrack, Dracula9AntiChapel's arranged soundtrack, New Threat 2.0, Ninostyle Battle.
For other news, I finished the game. Thanks for the mod, it was a blast to play! One particular thing I would improve in the late game: when you get your Chocobo to S-rank, can you disable Potion and Phoenix Down as rewards? It's really frustrating when you're farming GP in the highest rank class and even beat Teioh, and then RNG decides to give you nothing but a 5 GP / Potion reward.
Finally a question about the New Threat 2.0 Enemy Drop/Steal/Morph Google Spreadsheet by Berub (listed in the OP). In the Enemies sheet, what does the statuses column mean? Does it refer to the status effects enemies are vulnerable to, or immune to?