Isn't this the classic mistake of assuming "people" on the internet are a single homogeneous group? When Pebble had a kickstarter, a lot of proponents were vocal. Now its going into best-buy, those that are vocal are (a different set of) people who have the opportunity to criticize. Those who successfully funded the project and are proud users of Pebble maybe see less desire to be vocal.

There's nothing really to "go figure", its just different people being selectively vocal in their support/dismissal.