Depends on how much the vesting costs and criteria are and assuming the opt out leaves enough planning time, I would think this would be something the Brewers should look. The opt outs let Arrieta get back into the free agency game when the owners act their usual self next year or two, and the vesting options give him the career money assuming he doesn't get injured. Plus, more importantly, the opt outs and vesting allow the agent and player to save face. Yeah I'm thinking it's gonna be along the lines of JDM's type of contract.