I do agree with Jim's overarching point however. This team is in need of more than just one or two upgrades to seriously compete for the division, which will take contracts of multiple years and dollars to address. If they go that route, it's likely Donaldson is gone after 2018. If they patch the team together next year, is sneaking into the WC more valuable than the return Donaldson gives you this offseason? Probably not.
I love Donny. Everyone loves Donny! Even my Blue Jay hating friends love Donny. I just can't envision a scenario where this team makes enough improvements to justify holding onto him through the end of next year. In that case, trading him in the offseason makes the most sense. I fully expect them to hold onto him though and see where they're at come the end of June or early July next year.
We'd never be privy to this, but I'd love it if the FO sat down with Donaldson and asked him give them a list of places he'd be willing to go play. Let him know that they're going to be serious players for him next offseason, while retooling by trading him ala Chapman.