Sprint has pretty much neglected our area. T-Mobile improved by leaps and bounds in this area when they acquired MetroPCS. Metro duplicated the Verizon network throughout Florida and had developed quite a following. Sprint's network actually went backwards in that they replaced some macro sites beach side with small cells + band 26. Not smart because small cells just don't have the coverage. Forced me to get an MB.
While I applaud all that work they have done lately, it was all borrowed money. Their debt load increased from all the capex spending. There's no magic in this. You spend money your network improves. You spend money you don't have, your debt increases.