Let's just continue to disagree on this. I don't care if Swihart's hitting a .1000 in Pawtucket during "May or June," they'd never make him a "full time DH." They aren't going to call him up in May or June to "catch 2 or 3 times a week," either. He needs to develop right now, and he WILL start somewhere.
There are only 4 possible scenarios for Swihart: Injured, traded, starting catcher in Boston, starting catcher in Pawtucket. That's it.
They also aren't going to "platoon Benintendi" with anyone, either. If he struggles early on, they'll send him to Pawtucket. You don't ever "platoon" top young prospects for a reason. As of right now, they could struggle to find enough at bats for Young & Holt as it is, and you want to throw Swihart in the outfield mix?