One of the craftiest moves i have seen was 89 fball semi v Dubs, Keith Barr was blackguarding John O Driscoll, Billy switched Dinny over to Barr, Dinny wound Barr up, Barr saw red,For so many years, maybe even decades, that used to be Cork's strength.
Shrewd guys on the line who knew the game inside out, like the Silver Fox, to make a change (ever before bringing on subs) that would lift both players swapped. Might be a swap of the corner back and the wing-back, or a corner-forward coming out, or whatever but the cuteness to know what particular changes to make and knowing that their men on the pitch would benefit from being moved correctly, won us so many tight matches down the years.
I can recall watching various tight games when Cork were behind by a couple of points at half time and being very confident they'd have the wherewithal to win the tight game, which they almost inevitably did. There was never any panic, just a calm assurance that the line knew instinctively what changes were needed, and would make them.
Unfortunately that nous on the line alas appears to be gone. And it's something that's built up over years of confidence from it working - not panicking, not hooking a guy who's started poorly, but rather moving him in the hope/expectation that a new challenge for him is almost wiping the slate clean. "We know you're better than you've been doing, we've confidence in you so we're going to give you a different task, repay our confidence" kinda thing. If he's bad in the different position you can hook him then but too often imho we let guys in a position they're clearly struggling in, and give them "one last chance" only for the pattern to be inevitably repeated and they have to be subbed then, rather than give them a second chance in a different position where they and the team could prosper.
Of course when you're moving a guy, you need to be confident that it won't upset the balance of the team but generally you can have players swap position without it upskuttling them or the team - most of the players will have played in more than one position anyway. Moving the player who's started poorly won't make him any worse, so it's generally worth a try.