As sure as I am of Sui Generis getting through, I wouldn't wish it upon anyone to have to sift through the fire and brimstone of Steam Greenlight to actually stumble upon it.
A big reason why people want Greenlight taken down has to do with the overall quality of the games going for a spot on the Steam Store. Now that Steam, against all user complaints, refuses to enforce quality control on what enters the store, many people see this as a way to get their 4-hours-of-work Game Maker project on Steam through Greenlight. With a big variety in acceptable styles and the success of games with simplistic mechanics and art, a lot of things get on Steam that I feel should be available to play for free on Newgrounds. About 50% of the games you can find on there now are put on as a joke, and a poor one at that. Some people do it as a big thumbs down towards the current state of Steam, others purely to spite people who genuinely made a game.
Every once in a while, I go through the queue I've built up just trying to find hidden gems, and I'll tell you, they're hard to find.
If Sui Generis goes on Greenlight, I wish BM all the best to get through it. I, however, hold a fear that many people will miss out on it purely because it went through Greenlight.