The question is mistaken. The devs never "promised" anything. They had a roadmap that needed to be changed to adjust to the massive number of players and feedback.

Please do yourself a favor and read the EA information.

It really is your choice, but no matter what you think on the state of the game, it is well worth the money it costs to buy.

Lots of positive reviews so it seems many people do enjoy the game a lot.. and most of the complainers just want more - faster... that just tells me how much they love the game and want more of it.

If you want to be scared away from buying a game due to that, that is entirely your own choice.