I can kinda see that. He got Donaldson as the lower level toss in from the Cubs in 2008. The front line was roster filler low upside players. That said there would have to be a gem to develop with the low floor players.
Say 4 guys. Butler/Candy/Zag's. Then as a low level gem: Jose Albertos. He has plenty of polishing to do but has a pretty high ceiling. Add to it he is so far away the Cubs probably wont miss him. It will be a after thought like Archer and Donaldson were.
I don't think they are going to trade Albertos nor do I think that's who Beane would target. Here's what I'm thinking...
#1 2018 CF for Oakland - Right now Rajai Davis is signed to a one year deal. He's also hitting .216/.270/.327. Their best prospect who can play CF is Jaycob Brugman who is their #21 prospect with below average hit and below average power and he's an average fielder. Jacob Hannemann is a plus defender/runner hitting .303/.333/.382 in AAA. On a playoff team he's a decent LH bat off the bench but given Oakland's payroll constraints and given their OF is massive, Hannemann is a pretty good secondary piece.
#2 2018 3B for Oakland - They recently called up one of their better prospects in Chapman. They also have Yonder Alonzo at 1B who I imagine they try to re-sign. But they do have a DH slot so I think Candelario makes some sense for them given they have Ryon Healy as their every day DH right now hitting .273/.303/.509. So, Candelario sorta kills two birds for them given he can protect against Chapman not working out and he could potentially DH.
#3 2B depth - Jed Lowrie is having a solid year(.283/.355/.476). He's 33 and has a $6 mil team option they almost assuredly they will pick up. Long term you may be looking at Semien/Barreto as your MI. They've played Chad Pinder(.234/.289/.490) and Adam Rosales(.235/.268/.355) so their not very deep there. Chesny Young seems like a good secondary piece with Hannemann.
#4 Long term starter depth - If you're trading Gray you probably want to get something back as a starter. For me Clifton makes sense here. He's got mid rotation upside and is what a year maybe less away? He's probably higher value than Tseng but given how well Tseng has pitched I think the cubs can afford to let Clifton go as he'd likely be a #4/5 type guy on the cubs. Tseng looks like he will be able to fill that same sort of role Hendricks did to start his career.
My view is Young, Hannemann and Candelario can fill 3 2018 roster spots for Oakland for pennies. Clifton would give them some near ready long term starter upside. I think you could also discuss maybe one more bigger name like say Adbert Alzolay if you want to get a big crazy but that's how I see this sorta trade playing out. The cubs could make that trade and it really doesn't hurt them that much. Oakland gets parts they can use in 2018 that can actually hit pretty well. They probably wont be stars or anything but it's not hard to envision someone like Candelario getting every day playing time, hitting, and turning into a very interesting trade piece for Oakland 2-3 years down the line when he's expensive.
As I said I think some could rightly argue that isn't much upside for Oakland but as I outlined before, Oakland rarely goes for max upside.