Don't see the logic in bringing Fonua back if we have Faraimo & Naulago signed up for next season as we need forwards as we short in that area, even with the recent form of Paea its an area that needs improving.
Having another outside back particularly taking a quota spot just wouldn't make sense as we need to maximise the cap and quota so the main part of it is in the 17 each week. If we signed Fonua it would mean we would have two players who would be on a fair amount sat in the stand and at lest one of them being a quota spot which would be a complete waste.
Don't follow the logic of moving Griffin from centre in to the second row either as his form this season has been very good (despite what some think).
So bringing Fonua in would leave us short unless at least one of the current outside backs is leaving and he would be a replacement.