The only thing about Luai is, I recall when they were talking about him coming here, that he wanted to be the 7, I don't know if that was true or guaranteed, but if it is, they certainly won't change him, unless he requests it, remembering that he has "out" option coming up this November.
Re: Galvin, IF he is going, then they should probably get rid of him this year, we need to develop Latu's relationship with Luai, but as I commented above, will Luai want to play 6, which is obviously his best position.
If Gal stays, then we risk losing Latu and possibly his brothers. Personally, I'm over the Galvin drama, but I hate that his manager will look like he has won.