Sounds like this article doesn't even affect you, but if it did, most likely a merger might actually get you another option. So you are against it because "other big businesses suck" so this one will probably too? I've been with MetroPCS and/or T-mobile for years and they've had decent business practices from my experience. I wouldn't ever think to compare them to Comcast whom I pay every month and is the bane of my (and everybody's) existence.
I think you are lucky to have a cell provider in your area with decent business practices. That only remains so long as their is competition though. I don't have to be in a T-Mobile market to know the basics of a capitalist economy. Less competition means less innovation, higher prices, and worse service. Out of all the companies that claimed that their control of a local or regional market was for the good of the consumers, none of them worked out in the consumer's favor.
I don't believe that smaller companies that rent bigger networks are true competition as they require the competitor's network to exist in the first place. In order for that to be true competition, there would have to be price controls on what Verizon and T-Mobile could charge companies like MetroPCS. That way, if a company like T-Mobile was failing, they couldn't simply charge their competitors more money to use their network to make up their losses.