I noticed that, myself. It's plain some reviewers are allowing this to color their appraisal of his performance. They are also not always clear on exactly what it was that Ramasar did or did not do.
Quiggin writes:
Pauline Kael made fun of the gang members' makeup in her review. We tend not to give people "back in the day" much credit, but often as not things in movies that seem ridiculous to us seemed just as ridiculous to them, at least to the more sophisticated and self-aware. (Of course, there was a large body of critics who hailed WSS as brute realism, so there you are.)