Not everybody wants the same things out of life, and I've never thought it in good taste to explicitly or implicitly insult anybody's honest work, regardless of what it is or who they are.
Seriously, this.
The underlying question here is, I think, whether Braid was Important. Games are rarely seen that way - most of them are debated on the basis of whether or not they are "fun", but not on whether or not they somehow embody something larger and more fundamental than just being entertainment.
One possible approach (quoting from The Hip Gamer) is to distinguish between the game's implementation (the "system") and it's ambition (the "game world"). I find that game systems are usually best evaluated formally, where one can look to a review to comment on things such as depth, elegance, and replayability; game worlds are more subjective, where one reads reviews for more information on a world's theme, concepts, and morality when considering them.
What Braid does well is the latter; the world is clearly well thought out and considered, and the non-gameplay pieces (the story books between levels, the artwork, the music, etc.) all advance that world's realization. The game system is solid if not astounding: it's a platformer with a time-control element, with some clever puzzles. Does that make Braid "Important"? Perhaps -- there are a dearth of so-called casual games that meet those criteria. However, in the larger scope of gaming, I don't know that I'd put Braid on the same level as, say, the original Half Life, or Space Invaders, or Planescape: Torment. Gaming itself is unlikely to be altered by Braid's existence, even if playing through it is enjoyable.
1 + 1 = 3, for large values of 1.