I kind of feel like this issue became more prevalent as Greenlight batches became larger... When they only greenlit 10-15 titles at a time, at least then you knew it was the ones people wanted the most at that given point in time, and while I can only imagine some shit still slipped through the cracks while good titles would be ignored, solely because the former was up high in the Top 100 and the latter had been languishing at #101, it wasn't quite to the same volume.
All the same, there are some titles I'm kind of glad the bigger batches caught. Shantae. Mutant Mudds. Gunman Clive. Freedom Planet (this one in particular, since I'm a particularly big fan of it, but it's considerably more obscure). Things like that, that I'm not sure would've made it in otherwise. I suppose they'll have their work cut out for them with regards to selling well, standing out from the tons of titles of inferior quality greenlit at the same time... I'm not entirely sure what can be done about that.
(And since Revelations 2012 came out irrespective of Greenlight, I suppose all this rambling means nothing in the end.)