Like any IPM, it's a tool. It shouldn't be your only tool and it doesn't have to be used. I strongly believe that, barring genetics fixing these issues, you have to use what works the best for you and the bees. When a tool stops working or loses much of its effectiveness, it's time for another tool. I've lost a colony when I've ONLY sugar dusted and I've had a colony survive and even thrive when I'd given up on it. Somewhere in between is what you.....and your bees.....are going to need. It's as likely as not to be different for each hive, location or beek. I really don't believe in any single magic bullet. Oh, and I use Mite-Away II now and again. It's not fun to work with but neither are a lot of other solutions.
"My wife always wanted girls. Just not thousands and thousands of them......"