I've been playing since the end of S3. I've spent $515 and -- more importantly -- 3,155 hours of my life playing League.
http://i.imgur.com/nPdr2Qj.png http://i.imgur.com/LKx7jMT.png
I've generally agreed with Riot's decisions, even when Boards is throwing a fit about nearly every change this season (even the changes they asked for).
I don't really mind dynamic queue, although I have some ideas for improving ranked (Spoiler: pure solo + ranked clubs -- you'll see a post with details soon).
At one point, back before the old forums were shut down, I was the top commenter on Boards. The person in second place had fewer than half as many posts as me.
I've been invited to apply to the Riot design team. I did, for an internship this summer. It was late and they'd already filled the spot by the time my interview happened, but I'm invited to apply again in December and planning on doing that.
I'm not going to stop playing League because of this; I like the game too much. But Riot: I'm the kind of dedicated fan base this game needs to survive. This is the first time I've had a bad experience with League that I felt like you caused intentionally. And I'd be lying if I said I don't feel alienated and a little betrayed.