Funny, I was on the phone with a tier-two tech support rep just two days ago and mentioned UDP and whether it was ever coming back. He said, "they're working on it", but as it's been said before, I decided it wasn't news-worthy.
IDK, I would have to do some "scenarios" to see what "tier" would be best to start with and also would have do some testing at 3G to see if I can stand it once the 4G runs out, but it could be an alternative to the full-blown UDP I have now.
The "roll-over minutes" is another nice development and I do believe that is actually a bigger piece of news, though it's only rolling over one month. I want to see roll-over minutes being in perpetuity. This would make choosing a tiered plan easier and I'd feel less like I'd not get my money's worth.