Actually I have it pretty made, since I have single line plan with the 450 nationwide with rollover, 5000 night/weekend mins, 1500 texts, unlimited data - there is virtually no way to incur overage charges if you're me. Plus I get a nice 22% corporate FAN discount on top of that. After taxes, my bill comes to about $75/month.
LTE signal is fantastic where I live, and since AT&T has softened its stance on throttling, that makes it even better. I was only ever throttled one time, but I don't think that will be a concern going forward.
So yeah, I am keeping things as is for as long as I am able to. I have it made and as long as they let me keep my plan the way it is, I see no reason to change anything. I don't mind the 2 year contract at all, especially with being on the "S" cycle.