JIRA interface blows. However you're looking at it from a very selfish standpoint. The Trello team has probably been working on this for years with the explicit goal of an exit, better to get bought by likeminded product people and make a big return than to be bought by Google and have the product killed entirely.
Dude, go read the dev docs. Trello is not vaporware to make a quick profit. They kind of started that as a pet project and even them were impressed that it picked up that quickly. To the point where they had to fall back to some polling code because their webhook stuff was failing.
