There is not and has not been a particularly sound argument to bring Markakis back, even if he continued his first half onslaught. We have plenty of resources to upgrade at his position, and it’s our most obvious hole. We at least have controllable upside everywhere except catcher and 1 corner OF, and at least C we have Flowers as a really solid back up.
We need to find at least a semi stud through FA or trade to replace Markakis.
This is the reason I'm not particularly high on trading for Pederson. Sure, he'd be an upgrade - but trading for him requires you to roster 2 players since he absolutely has to have a platoon partner. We have the money to spend to go get a corner guy that can play regardless of who the opposing Pitcher is, so use it. I still can't imagine AA getting into the Harper sweepstakes, but if he's going to burn prospects to get somebody, at least get somebody who can play every day. If you don't want to spend the money on the marginal older guys (Brantley, McCutchen, Jones), that's fine - burn a couple prospects (not named Riley or Pache) to go get Alex Castellanos and try to extend him after you get him.
I forget who originally mentioned it, but will admit I'm warming to the idea of moving Camargo to the grass. If he can track balls well enough to be an average guy out there, you've suddenly got a really strong defensive OF given how much ground Acuna and Ender can cover and the three cannons they'd have out there. Johan should cover more ground than Markakis, so you'd be upgrading on both sides of the ball as well as clearing the way to get Riley's bat in there. If they decided to go that way, I'd have to talk to Miami for a long time about Realmuto this winter - if you could get him for anything resembling a reasonable price, I'd probably do it at that point. A lineup consisting of Acuna, Ender/Albies, Freeman, Realmuto, Camargo, Riley, Albies/Ender, and Dansby makes my mouth water. Bring Duda back, and your bench becomes Flowers, Duda, Culberson, and Duvall - not too shabby.