Why do you feel the need to raise the dead?

Impressions of bug severity are personal when the bug doesn't prevent enjoyment of the game at all other times. Yes, bugs are bad. A bug which robs you of a reward winning climax is annoying. I personally don't consider a bug huge if I can play that same level repeatedly and expressly avoid it.

That being said, one Spartan Ops level did surprise me by not ending when I 'wasn't' deliberately playing in a manner completely outside of the planned script. 1 in 208 is not huge. There was 1 other where I was pushing the envelope on the geometry fringes and the 1 Cody mentioned. Both were subsequently avoidable.

If my memory serves me, Halo REACH had more than one scenario where a campaign level would not end properly if you played too far off script. Were those huge bugs in your opinion? They weren't in mine.