It's not entirely useless - sure Peter Fonda can't act and neither can Blythe Danner but she sure is pretty to look at and does an adorable act with a pair of glasses. I mean, it's in the "so bad it's good" category of films where the original Westworld seems to take itself far too seriously considering the premise.
The sequel also has the classic lines:
"I smell heathen scum!"
"You smell yourself sir!"