I thought about it but didn't because the battery life difference is pretty big (10-14 vs 30), and according to his comment below, apparently the battery is not replaceable.
I assume it would actually be replaceable if one were sufficiently motivated, but the fact that it's not meant to be replaceable is not so great.
Honestly if the PT2 weren't replaceable I wouldn't mind so much, since starting of with 30 days of battery means it can degrade a lot before it hits a threshold I care about (1 week, roughly). But if the PR2 starts off around 10 days, it doesn't have far to fall before it hits that threshold.
Perhaps the biggest reason I didn't swap my order, though, is that I don't want to wait several more months to get my Pebble!
Yes, your calculus is exactly like mine - there are things to like about the Round (personally I just find round watches more aesthetically pleasing, we've had a couple hundred years of mostly round cases...), but I want longer battery and a shorter wait to get my watch.