I'm certain that the movie seriously messes with some EU novel that came out some 25-30 years ago and that the movie screws with it a bit too much for some but there's a lot to like here. Enjoyable heroes, tough but human bad guy, memorable scenes, different places, cool battles, solid directing, a number of nice nods to the continuity, and just gritty enough because it's a war with people blasting each other and teddy bears bonking guys with rocks to win the day was probably a bit too saccharine for some.
Some of it's dumb but eh. Solid watch and I stand a chance of being dragged into seeing it again and don't mind. Solid movie lots of fun 8/10.
I'd also be OK with more side stories like this but I'd prefer it didn't stray too far from the main narrative I guess? I think this filled an important gap in just how some top-secret super-weapon plans fell into the hands of some ragtag bunch of rebel scum.