I can't see Flip wanting Lee and Barnes over Wiggins and Bennett, fighting for the 8th seed probably isn't what Flip wants. Why not get a couple young guys you can add to Rubio and LaVine which will give them a pretty good core to watch develop.
I agree with you re: what Flip SHOULD do. But what I've seen reported is that Flip is hellbent on getting to the playoffs THIS season. The only way to do that is keep Love or do the GSW trade, imo.
If I were Minny's GM, I'd take the Cleveland deal because it does more to set the team up for future success. But unless what's been reported is wrong, Flip wants to get to the playoffs this season.