Is that based on the assumption that SD won't learn from their mistakes and repeat them in the sequel? I find that to be unlikely as most sequels improve and refine the game in part from community feedback. Maybe your just not a fan. Do you want to see this game improve or do you want it to crash and burn in flames so you can say "see, I was right!"? Granted that SD could have done a better job as developers but what is really hurting the prospects of any sequel are the "fans" who talk and spread so much [censored] about this game that it discourages any potential new players from picking it up.
But hopefully we won't have to wait for a sequel to see improvements to Brink as long as SD continue to listen to the communities constructive feedback and support the game through patches when needed as well as adding more content along the way via DLC.... then Brink might grow into the game that some think were withheld from them from the beginning.
But that's the problem, we're not getting any feedback. No determined dates or good faith in what they say. (Now it's only two weeks free?) You know, at this rate I expect them to go, "Oh, did we say a new Brink game? Haha, we only meant a moderate expansion back for fourty bucks. Kinda like Dragon Age Origins did, ooh, but it's only thirty bucks for the first two weeks. Act quickly." It's just discouraging for me as a player to give these guys any kind of slack.
And no, i'm not going to tell my friends to pick up this game. I don't want them to waste their money on stuff they won't like and isn't worth the price. (I tried like all hell to stop anyone from picking up Black Ops.) I tell them the honest truth and don't recommend it. Yes, it's fun, yes, it can keep you entertained. But on a techy level, it's bad, and it has a few nuances that will drive you up the wall. Wait 'til it's cheap, or ignore it and go for the (going to be) [censored] awesome co-op modes of mw3, or the other new shooters just around the bend.
When this game improves, and when some more substantial content is released, I'll let all my friends know it's better and worth playing. But for now, it's not really worth the trouble.