I'd prefer bring a solid SP and put Bard as a closer (even he is not ready IMO), if you have to make this transition at some point, now is the right moment given the circumstances.
I think that the gap is much bigger making the transition from a Setup spot to a SP spot than to a closer spot.
I thought that the plans for Bard in this organization were as a closer not as a SP, what did I miss?
This idea to put Bard as a SP is new, isn't it?