As Lobey Dosser says, if Erwin has his head screwed on, then potentially a very good signing for Killie.
Whilst I would've definitely taken him back at Motherwell and it's a bit annoying he's signed for a direct peer, were we even in for him? It's also difficult to justify bringing him in whilst we still have Moult (for now), Fisher and Bowman (regardless of whether we rate them or not) No point mentioning Blythe as whilst he'll continue to steal a wage from us I'm quite confident we'll never see him in a Motherwell shirt again.