The problem with DMZ Plus is that connections through it still fill up the UVerse NAT table, which has a maximum size of 1024. Random people portscanning you will be passed through DMZ Plus, placed in the NAT table, and potentially boot off normal connections. This is why I take the effort to double-port-forward everything I use through my Netgear.
If anyone else offered more than half of the upload that UVerse provides, I'd switch. I'd pay several hundred dollars to replace my UVerse router with a UVerse modem. Verizon said they don't dare come to Milwaukee because AT&T has the entire county bought, so FIOS won't be available ever.
But yet, America's Internet Service market has lots of competition, somewhere. I wish I lived in that magical place.