I see this particular project is getting some pushback over certain choices. But that's the thing with 'fan edits' in general, they're mainly done with the fan editor's own wishes in mind, no matter what anyone else thinks. Looks like he's done some neat effects tweaks and re-grading work on it so far however, so good luck to him.
But for those like myself who prefer the 'dog-burster' footage over the 'ox' in an 'Assembly Cut', there's already the excellent
Alien 3: Third Cut edit by 15MaF which retains the character moments as they are. And he's done some neat tweaks along the way too, where re-grading is concerned. Definitely my go-to version -
https://ifdb.fanedit.org/alien-3-third-cut/