Hilariousy dumb? I'm not saying I'd do it...I'd want to feel really good about Hader's health and I don't know how many more years of control he has...but Kieboom isn't a prodigee prospect. It is far from guaranteed he becomes a good big leaguer. Hader has proven himself to be dominant in an area we are always sorely lacking. I mean if we retained Rendon (and Stras) and flipped Kieboom for Hader...that positions us quite well to repeat. 2B isn't that difficult of a position to fill.
This is probably the only way it makes sense. Both Stras and Rendon would need resigned and we go for the repeat now.