I'd say do it. A lot of Craig's fantasy value comes from his 2B eligibility which he's likely not going to have next year. He's still good at 1B/OF, but there's a ton more depth at those positions to replace his production. CarGo helps you in every category (assuming you play standard 5 cats or a close variation) and in a keeper league will be insanely valuable.
We ended up settling on
I think I end up winning this deal for the season, but he has the long term advantage as I def won't be keeping Lee ($42), and Darvish will be iffy ($24). He'll get to keep Middlebrooks for $5, Kennedy for $3 and Worley for I think $9. Not super excited about giving up on Kennedy but I wanna win this year and this yaer just hasn't been that good for him. This should bolster my W's and K's, bring some relief to ERA, and probably be an even trade off in WHIP when it's all said and done.