The 9 position is already messy at the club, I'm not sure bringing in the son of the coach is going to help, even if it increases the likelihood of Arthur staying (which it may not).
Ackers seemed to start well but he's not looked good for a while. I don't think spelling him from the bench worked at all, but for whatever reason he doesn't look to be the dominant hooker we were hoping to lead the way with.
O'Connor is great for effort, but I think as a team we're not as fluid with him on instead of Ackers. Corey Johnson has shown glimpses in attack but he's also made some awful defensive contributions in the limited time he's played this season (e.g. letting players run through him at marker). I think we need to bite the bullet and let Johnson go.