Johan Camargo is just not that far off from Michael Brantley. If you feel Camargo can handle right field, and he does have a great arm, then why not Camargo?
Because as of now, AA's said he intends to use Camargo as the super-sub, not a full-time player.
There's no way to tell yet whether that's just what he's feeding DOB and Bowman, but that's the company line so far.
It's obvious that a big trade is a possibility (as has been mentioned multiple times by others), and there may very well be other things that have to happen before that big deal can be made. The worrisome thing about that is that two of the main teams we've talked about being the main possibilities for those - the Dodgers and Yankees are either not big fans of that monster contract splash (the Dodgers) and have had a pretty consistent history of not moving prospects they like unless they absolutely have to (both). The Yankees have continued to hold onto Frazier despite the fact he probably could've been moved at any time over the past couple years to upgrade their rotation, and it's not like they can't afford to hold onto Gray for depth and use him out of the pen if they want to.
Given the Yankees' current situation, it's not out of the question to assume Cashman might have told AA that a Frazier/Gray deal is there to be made the minute he agrees to part with Camargo and one of a number of arms - and AA just isn't willing to give up Camargo. Maybe the Dodgers have given him a handful of names they'd take in return for Pederson or Verdugo IF they sign Harper. Maybe he was close on Peralta but wanted to see what happened with the other two situations first and wasn't willing to give them Pache for him just yet. Who knows?
Given the fact that Ender's under control inexpensively and that you've got Waters, I'd circle back to Arizona and offer them Pache and Wilson for Peralta and Bradley. That fixes LF, keeps Camargo as the bench upgrade, and fixes the pen. Then you play the waiting game with the rotation. Maybe Folty, Newk, and Touki take another step forward, Fried and Soroka are healthy, and Gohara's weight loss and renewed focus lets him finally make the jump you've been hoping for. As has been talked about before, the rotation needs to be the last thing addressed - possibly not even until the deadline when you see how the kids advance and what rental arms are available.