True, but it does take almost as much effort to go into new territory as it does to get things bounce-a-quarter-off-it exact.
Going "completely original" isn't necessarily a better step either as stuff like Deadliest of the Species proved pretty handily.
As with most things, finding the optimal balance in a path of diminishing returns is best, Battlestar Galactica found this balance pretty well for two and a half seasons before descending into "let's simply critique current american politics and give all our main cast schizophrenia instead of just the one guy and his imaginary girlfriend with surprisingly sound advice".
Both ACM and 2010 came under time constraints but the resulting paring down also shows where the focus was to begin with. Almost all of 2010's cut content was width and options (weapons, class abilities, locations) whereas ACM literally cut out the entire story and contextual reinforcement other than Hadley's Hope Nostalgia Tour. (which was a stupid idea to begin with, I totally agree)
Keeping things this clear and simple may not be the best use of license, but SEGA doesn't really seem to know what to do with it as it was, the guy who spent the bulk of effort procuring it has been gone for years.
Lemme ask you this then, IF Isolation was a character that no ties to the previous cast in any way and the Sevastapol was in fact a station that had been missing for 200 years circa Alien timeline and archeological team was investigating it and got chomped by a 200 year old crabby Alien that came out of hibernation or [insert insertion mechanic here] would it be more palatable?
Or is it the the changes, especially to the creature are always seem to be borne from a mindset where "it has to be this way or no one will get the concept" (aliens = sapce dogs, corporations are inherently evil, there's always a traitor/spy/asshole, must use all current video game buzzwords in the game's white paper, etc)