Personally I’m quite happy to see new alien species that manage to fit in with the OT aesthetic. The prequels relying so heavily on previously seen aliens as background fodder was just another example of universe shrinking IMO.
These new rogue one aliens look awesome. I’m not opposed to seeing a familiar alien face here or there throughout the films, but when you start seeing the same familiar aliens more frequently than new aliens it starts to feel lazy and less believable.