It's still a frigging small arena, though. I know the ability to pay is important. But so is the ability to have a large amount of people paying.
So say an average of 14,500 at your listed ticket prices is enough for Winnipeg to, if nothing else, break even (which is way better than Phoenix is doing). Gravy, right? Not really. The issue is that such a small arena makes it harder to make an average attendance of that number.
The problem lies in that people assume that if the average needs to be 14,500, the max doesn't need to be much higher. The reality is that many, many teams, and Winnipeg would be among these, see their attendances change dramatically depending on the opponent. Sure, the Peg might sell out regardless the first year due to exuberance. But then you start seeing years where maybe they'd sell 17,500 against the Nucks, 17,000 against the Wings, 12,500 against the Avs, 9,000 against the Jackets... but then you have to scrape 2k+ in attendance off of all those top end numbers because the capacity is only about 15,000. You end up with an average of maybe 12,500 instead of 14,500 because you're not getting the attendance hits from the big draws that you could. Even with decent priced tickets, that's going to equal problems.
For the first couple years, I'm sure the MTS will be fine. But within a handful of years they need to start looking towards a new arena. On the plus side, the MTS would still be very viable for an AHL team, or at least to its good sound quality, other events.