We have a good 16 or so players coming out of contract. Here's how I imagine things will shape up:
Cowan, who is out of contract, will leave, allowing us to sign one of Afoa/Hibbard as a marquee signing. Let's just assume it's Afoa. (I'm pretty sure it will be, tightheads are expensive.)
When Afoa joins, Harden will leave.
This will give us the salary room to sign a small-name 9 to provide back-up to Knoyle and Robson. This should account for Afoa without reducing squad size/squad quality elsewhere.
As for Hibbard, well, I'm expecting a good 10 players to be moving on this season. There are numerous ways of making up the cash. We could consolidate Edmonds' and Dawidiuk's salaries into Hibbard's and reduce our hooker count to 3, using Ryan Charles as a back-up in the academy (most teams only have 3 hookers, I'm not sure why we go with 4). We are overstocked in the back row (Cox, Kalamafoni, Savage, Hazell, Qera, Kvesic, Morgan, Evans) - Qera and Cox will probably move on and Hazell might retire, and we could bring in Moriaty and Ludlow as cheap, academy replacements. Also, sadly, we might not even re-sign JSD (for his injury record) or Sharples (Tigers rumoured to be after him). Freddie is also being lured by other clubs. We have James and Tindall on the cusp of retirement. Other players out of contract include Lokotui, Knight, Taylor, Mills, Bentley, Dan George and Martyn Thomas. So there's a lot of scope for squad re-structuring.