No 8 is a potential game-changing problem area. One long term injury to Valetini and on current strength in the position we are up shit creek.
The standout alternative is probably Isi Naisarani but under the present Giteau Law he is ineligible. If anything, eligibility looks like being tightened up rather than relaxed.
Harry Wilson has his admirers, not all in Red. But it is becoming clear that Dave Rennie isn't one. Personally, Harry reminds me a lot of Melon Finegan, and based on how he played at the U20s Championships a couple of years ago and his present skill strengths, I for one think he would be better suited at 6 than at 8. And contrary to some opinions expressed here, Harry really looks to me to hit hard in defence, if a little late on occasions.
Langi Gleeson seems to be the next most popular option. In truth, he has tremendous potential but is very inexperienced and probably a bit undersized for test match battle atm.
Pete Samu is the alternative at the Brumbies and has shown on numerous occasions he has the footwork that Rennie is looking for in a No 8. He tends to play wider that Rob Valetini and that might count against him in terms of potentially being a starting No 8. He is also in some views a more natural No 7 in the way the game is played internationally today, and has carved out a role for himself as essentially a must have bench cover for the whole backrow.
Will Harris is the other logical option. Played No 8 in the U20s team that included Harry Wilson at 6. Has better footwork than Harry but isn't as physical in contact as Harry. I think Will runs the risk of not meeting Rennie's ideal No 8 just as Wilson seems to be in that boat, but for different reasons. And to further complicate matters, Will and Gleeson will be competing for the same spot at the Tahs in SRP23.
So, ideally Naisarani can be enticed to sign with a Super Rugby side for 2024 (assuming he is available) and therefore become test eligible. As others have observed, I think the whole backrow becomes unbalanced if Samu plays 8 while Hooper owns the 7 spot. But really we have no other alternative type of 7 other than Samu if Hooper's style of play is determined to be not what is needed. McReight is too much alike to Hooper if the coaches want to go in another direction, as most of the world seems to be doing now. So failing Naisarani, it will be up to Rennie and his Assistants to make a decision between Wilson and Harris where neither is entirely what they seem to want. Anyway, that's how it all appears to me.