I guess that depends on Iro.
If he goes, Sifa moves back to centre.
If not, then it’s a good problem to have and you pick “horses for courses”.
In saying that thou, I’m sure injuries (and dare I say, suspensions) will dictate along the way.
I always though Sifa would age out of centre within next few seasons. Just not very great lateral mover anyway and will get harder and harder to keep weight low.
I could see a spot opening up for a contest if Iro left - Sifa, Stonestreet, Gabrael, Vea'ila probably all in contention. You can get a good centre from that lot with another preseason under their belt fighting for it.
Sifa a good chance of winning but may transition back to forwards during next season, or following it.
Happy to keep Iro though if we can