Nope. Makes no sense to me.
People say "it's their job" and all that, but their job is to win games. It's strange when they're still in when that job is done.
I am not aware of any coach in the NFL who makes score-driven personnel changes in special teams units. You play the unit that practiced together all week, barring injury.
I think what we have here is a fundamental lack of understanding of how coaches use specific special teams units. This isn't college where you have 80 guys. You have 43 guys plus kicker, punter, and long-snapper to cover offense, defense, and four core special teams units. If you take out you top 10 "key players" by however means you use to decide that, then I am not sure how you can expect to run the play and (for example) not get the kicker clobbered. The best blockers play up front on the PAT conversion. That has to include Gronk, particularly in a week where the teams two starting guards were both out with injuries.
At some point Gronk gets the tap on the shoulder and gets the message to take the rest of the game off on offense (and he did, before the last scoring drive). But he knows he will be out there on the special teams unit he practiced with all week. That's just how it works, in New England, in Indianapolis, EVERYWHERE.
Dungy: You have a set group for the PAT conversion. I always had Jeff Saturday playing RG on PATs and never even considered taking him off, no matter what the score was. You sometimes sit players on offense or on defense, because they are used to subbing out. You practice those changes and adjustments. The special teams guys are different-- they work together all week as one unit and they play as one unit, whatever the score.
Bruschi: When I was playing defense and we were blowing out an opponent, you were told, "You're out of the game now, Tedy, but you're still on the field goal block team."
It's just the way it is in football.