Not sure if want about a total Alien redesign. The Alien kicks a lot of ass. The key concept here, I think, is consistency with Kane's Son in terms of design elements. If it's not our father's (our?) Alien, fair enough, but there should be a sense of lineage between Jockey Alien and Kane's Son.
Also not sure if want about the Jockey explanation. Some exploration into the area would be cool, but not to the extent of removing all the mystery.