Two things here 1. The time Warner spectrum deal only occurred because the DOJ threatened Comcast With antitrust if they completed the acquisition. I don’t know how your friends would be able to talk about time Warner spectrum for 2 year when it was thrown together over a few months after the Comcast deal was put on ice.
The biggest thing with T Sprint is the state of sprint. If sprint isn’t acquire by T Mo sprint will die in a few years the spectrum and infrastructure will be bought up by ATT/VZW who will have a duopoly with T Mo a distant third. Three competitors are better than two which is the case for this merger. Also they are for sure lying about no price increases.
Although large mergers are almost always problematic for consumers, I believe you are correct as to this one. Sprint's days are numbered under any scenario. Having its infrastructure go to the #3 player (by total customers) is the best outcome from a bad situation. Yes, rates will go up, but not as much as if AT&T or Verizon were to acquire Sprint's assets and use them to put the squeeze on T-Mobile.