So you're a "motion in the ocean" kinda guy right?
I kid, I kid. I couldn't resist a little humor this evening.
Anyways, I agree with you to a point, if there's quality and polish and a good story for a shorter campaign it doesn't matter as much...necessarily. It's not like CoD 4's campaign was uber long...but it had one helluva story for its day. BC2 fwir was decent too but also longer. For a game that cost upwards of $100 though...there's got to be more than a few hours worth of campaign IMHO. They already covered the costs of development in pre-order sales I'm sure, if not being covered by the last CoD title's sales. There's really no reason for sub-par experiences in CoD's SP IMHO. I do realize that comes with MW Remastered, and that has some costs too...but the bulk of it is IW.
Also, I'd rather have a story I can get into chapters/sections of, and stop at some point if it does feel too long or I get distracted...I'd rather have more content to conquer than dominated in the first sitting. Especially for the price of admission. Not saying IW is THAT short...but damn a couple of my friends that did buy this title were not impressed with stability or length/quality of the campaign.