I think Smith is a decent fullback tbh, a bit underrated. I guess they aren't sure on Healy yet, and with Hastings injured we aren't massively stocked at 10. I just don't think it's going to work out, it's like that time Hogg played 10 against Italy, it was serviceable, did the job, but was nothing more than that and actually nullified a lot of the stuff Hogg is good at.