I liked Eder before his injury, but his command hasn't come back yet and due to age he's approaching non-prospect status pretty quickly. He'll be 26 in October.
Hopefully he figures it out at some point this year, but early returns aren't looking good.
And this is coming from someone that liked the trade from the Sox perspective.
Also Burger is hitting .228 with an .281 OBP and a .702 OPS for Miami. Just seems like it might be a nothing for nothing deal.