Some of the detail seemed at odds with existing Alien lore (again). The research vessel was returning after a voyage lasting decades (did they say 63 years), yet in Alien, Ripley was looking forward to getting home to see her daughter and after the stop on LV426 the crew were disgruntled that the diversion meant a low fuel consumption journey back to Earth taking 10 months. In Aliens, Hicks stated they could expect a rescue mission to arrive two weeks after being declared overdue, albeit that probably from an outpost not the Sol system.
The tech in AE looks to be pretty much the same as Nostromo and the Sulaco as regards FTL travel.