Which high quality prop? If it was as easy as that, I'm sure Sims or Ah Mau (who I wouldnt write off as a starter just yet) would have been punted.
In addition, you are then relying on a 21yo to punch out a full season as a crucial part in a prop rotation. Keeping in mind that, aside from a few freaks like Klemmer, props dont start to hit their straps properly until mid-late 20s. It's a position that requires a high workload on large men and will take a long time to adapt to, even just a bench role.
Then there's the question of depth.
What they are doing with Sele seems to be exactly the plan for Lawrie and Kerr - time in reggies to adapt to that level and then prep them for the step up. It's the best thing for them and we will gain the most of it in the long run. In the meantime, while we will struggle to replace Packers full package, we can go partway by bringing in an aggressive forward leader type (such as Blair) or an impact prop who is proven to be up to it (such as Kasiano). Someone who can fill the voi between now and these guys being 100% ready.
I dont want to see another Jack Stockwell.
Benny
Re: Props available Blair would be my pick as to whether you can get him for 2 years is another matter but who knows.
Potentially there is also the option of De Belin into the front row rotation as he is actually a centre 3rd player already and Sele into lock as he is certainly showing some sparkling form and creative ability.
We are seeing more tight forwards knocking out 60 minutes + which is part of the adjustment with the reduced interchange rules and one thing that is really evident in our squad is their fitness and ability to knock out big minutes.
I don't see having a rookie on the bench as that big a problem as we can shut down his game time if necessary.
As I said to Brissy IMO it is the keeping of bench players at reasonable $$$ that may have been the area to look at if we really wanted to keep Packer.
A question for you
If we keep winning and we hold onto our current squad and we start winning again next year how will Kerr, Leilua, Lawrie, Host ever get a crack at 1st grade?
Also if they leave for greener pastures does that mean we start the cycle of buying short term players yet again and then set back the pathway for the current U/20's players coming through.
Once you get into this cycle it is incredibly hard to get out of it and at some point you have to bight the bullet.
IMO our current crop is actually good enough for us to bight the bullet and press on with our pathway investments.