I think Greer could've been a good character if they had toned down the psycho crap like they did in Light, Justice (the sweet potato bit), and Faith ("Spirit of cooperation!"), but the writers decided to play that up way too much (it was good in Time, though, when everything was hitting the fan).^Please let Ronon show up and beat the crap out of Greer. I absolutely cannot stand Greer.
The real problem with SGU is that they seem to be hitting us over the head with certain aspects of the characters and not doing enough to flesh them out, aside from Rush, who got screwed over early in the show with two stupid scenes that only existed to make him look bad instead of morally ambiguous (which I think they were going for).