I like Assad for the 5th spot out of spring. It allows Wesneski to try to figure out lefties for a bit in AAA and Wicks can have a lighter workload in Iowa for the first month or two.
Regarding Assad, I know some of the numbers don't like him as much as his ERA, but I was legitimately impressed with him toward the end of season in the rotation before he was inexplicably removed. He throws a lot of pitches and gets GBs, and I'm a big fan of his 2 seam/cutter combo. If there was a pitcher getting by on smoke and mirrors last season, it was more Wicks to me than Assad.