For what little input I can suggest, my plan for Yavin 4 in Kotor in my head was to just use ported Dxun modules Thor110 provided and do the planet kinda in reverse. Using repurposed TSL modules in kotor as 'new' levels feels like the modern equivalent of just reskinning old Kotor modules.
If you could get permission from the animator, you basically already have the Yavin IV Ebon Hawk animations made.
IDK what you'd do for the temple hangar, here maybe get creative and imply it landed somewhere off screen like how it works for the Yavin Station in the vanilla game. You work your way from all the Mandalorian Base (abandoned military settlements around the temple), go through the two main jungle areas (remove the original TSL Ebon Hawk at the end of the first one), go the the temple exterior of Exar Kun (Freedon Nadd's modules) and fight a spirit of Exar Kun inside his (Nadd's) tomb or something. For some variety, the weapons caches could instead lead to a hidden modern Sith Base or something that's being used for... nefarious deeds or something. The Holocron toolset lets you create custom Sith bases, right? That could add some extra variety and more quests. This is just some brainstorming I had on a rainy day. I'm also a big fan of the cut Kotor modules, the cut Kashyyyk level and the cut Tatooine cave would work good for some kind of story relevance, the latter especially towards providing more hints about the Infinite Empire or Rakata
If you include the weapons cache with the droids (it feels so out of place I'm almost convinced it's just a repurposed old Tatooine Anchorhead module), combining all Dxun modules, a new Sith base and those two cut modules, that's 8 or 9 modules, something like that. On par with planets like Kashyyyk and Malachor in terms of length maybe.