Budget is exhausting, that's obvious. Dragon Commander was funded with revenue from DKS, Original Sin with revenue from Dragon Commander and Kickstarter pledge. The budget from DC was getting thight last year, that's why a KS campaign was pulled of, but let's be honest, one million USD can keep them running for less than a year (my guess is 9 months). It's been a year now, so I guess budget (if there still is any) is indeed getting very thight.
But let us not forget that many bugs that were discovered during beta were consistent during the whole game, so removed in Cyseal -> removed everywhere. The other areas just contain other content than Cyseal, no gameplay mechanics whe haven't seen yet (Well, for the most part at least). There is little difference in experimenting with those mechanics in other areas. There is still one month to see to that (closed beta sessions is supposed to deal with it).
Still, there will be a fair amount of bugs left, I won't deny that. But having a bug-free game is no guarantee for a popular game, neither is being buggy guarantee for an unpopular game. Hell, even bad games can be popular (I'm referring to Skyrim). To sell the game is a game on it's own!
