I don't mind the signing at all. I could see how there could be some high upside. The concern that I have though right now is that the starting rotation still doesn't have much velo and that's a lot of lefties. It's nice that all the lefties do something different, and they all have different arm slots to give them different looks, but they still need more velo, and preferably RHP velo.
It would be nice to see Killian stepping up and taking that last spot. When he was topping out at 101 during ST he was down right nasty - you know before his arm fell off for the rest of the year.