It was only a matter of time. Good thing I took one last advantage of a subsidized phone after the iPhone 6S came out. I guess between paying full price, not getting the $25 Next discount, and raising the price of the unlimited data plans, that's how AT&T is going to try to get the rest of us off UDPs.
Not if you use tons of data. I never have to worry about overages. Also, AT&T has been upgrading lots of these (even the 450 minute plans) to unlimited voice and text, so after all the discounts it winds up being slightly less than a 5GB shared data plan.
I use 30+ a month and pay less than my unlimited AND I can tether.