This isn't meant to improve coverage but capacity instead.
I think the article made that clear with respect to the use of small cells. You know, just like Sprint will be using with their Wi-Fi-like spectrum.
You and your cult complain so much about "Sprint bashing" yet you come here to bash T-Mobile.
This is once again about T-Mobile being on the forefront of wireless technology. Ironically, every move they've made for the past two years has benefitted you and your bill.