I realize nobody much likes this episode, but I thought it dealt with some compelling issues.
I think so, too.
I don't think having the characters (*all the characters*) revert back to primal instincts was what's wrong with the show though. I think that many of the best Trek episodes have shown that, including All Our Yesterdays and the TNG show where Worf bit Troi on the cheek.
ughh i try to forget that tng one

frankly the characters reverting to primal is to me the big thing wrong with this episode.
while the they do start to gradually evolve and regain things like speech it is done so slowly a lot of people just dont see it.
it would have been far better if the grunting snarling eating insects had been kept to a very short sequence and then hoshi , archer and mal (who are far more affected then tpol) fall asleep and dream .
we actually see more then one dream and each dream is more complex then the first.
after they awaken from each dream their behaviour is more complex,,, we really see the "people" who could have created that civilization.