Why? Why drive this into the ground? This franchise has pretty much followed the Leprechaun formula, with it now being in space. Next one, the Crites will probably wind up in the Hood.
It's just boring and makes no sense. The characters are dull and two-dimensional. Drastic character changes from previous installments make no sense. Even the Crites don't feel that threatening, despite the first death being a bit more gruesome than any of the previous ones in the entire series.
Actually, I think that's part of the problem with this series' trajectory. In the first movie, the Crites are the main bad guy and the main problem to deal with. After that, it almost feels like they're there to set things off, but they aren't the main problem the characters have to deal with any more. There are other frequently more pressing problems and threats that have to be dealt with, and it seriously has taken away from their screen presence.
If you're seeing this to resolve the cliffhanger from the third movie, you're honestly probably better off simply using your own imagination as to how would play out. Don't waste your time, because that's exactly what it will feel like you've been doing.