Nope. I've had every major carrier except T-Mobile and I would never go back to Sprint. If you're going to be paying half of what you're paying T-Mo, rest assured that you will almost certainly be getting half the coverage/speed, half the customer service, and double or triple the frustration.
There are edge cases where people love Sprint's cell service and customer service; but spend 15 or 20 minutes reading these forums and you'll find that those people are the exception as opposed to the rule.
I have to disagree with this in general.
If Sprint had not started dropping our phone calls we would have stayed with them. Things have gotten much better where I live - it's just not enough in the places I work, live and play in.
But I'm only one person and there are many people who have decent speeds and coverage with Sprint in my market, especially on the east side.
So, I think it comes down to location.
I will grant you that the other carriers have more locations with better coverage than Sprint does, but that doesn't mean Sprint is all bad. And I know you covered yourself by saying there are edge cases as well as mentioning the issues several people have discovered here.
But some points about the last thing.
• How many people have asked lately about unlocking Sprint iPhones?
• How many people have asked lately about how to fix their coverage and speeds?
• How many have complained lately about Sprint?
And I define "lately" as in the last year. Sure, there's always a case here, but if you compare to how it was in 2012-2014 to now you'll find that there has been a dramatic dropoff on posts. You can argue if you like that it's because Sprint started unlocking phones and people just left and didn't bother to post here, but I think it's more than that. As a former Sprint customer I've handled a lot of these Sprint posts over the last three years or so. The amount of those posts have sharply decreased in the last year.
I'm not saying Sprint is wonderful and that everyone should be on Sprint (I'm not on Sprint myself) but I do think things have improved. Location is going to be a big factor in that now and no one can paint Sprint with the broad brush of "Sprint sucks" anymore.