I expect the value of Meyer's future starts to be low, since they'll cycle through much worse pitchers and start losing more. But hey, in the future they'll have the best players up right away, really.
I don't think this is fair. The Twins have certainly jerked around players in the past but if the player looks to be an unstoppable talent, he hits the Majors pretty quickly. Joe Mauer was up in his age 21 season. Liriano was up in his age 21 season. Arcia was up in his age 22 season. Hicks was named the starting CF in his age 23 season. Sano would have made the Majors in his age 21 season if not for the injury. Buxton has a shot at making it to the Majors in his age 20 season and almost certainly will be in Minnesota for his age 21 season.
As excited as I am to see Meyer, he has five AAA starts and he's still walking a few too many batters. There's absolutely nothing wrong with giving him a few more starts to see how the new changeup shakes out over more than two dominant starts.