Your concept of a rebuild ignores how important that competitiveness, leadership and wins along the way are to the development of young players, and the pace and completion of the rebuild.
I'm not advocating gutting the list of experience and going full Melbourne. I said as much above (and in dozens of similar posts on the same topic).
You never go full Melbourne.
The goal is to remain competitive and avoid floggings and to build from defence first (young backline learning under fire and holding up) while also getting games into the kids.
We did both of those things with aplomb this year.
Next few years we will be gradually moving towards a more offensive game plan (you saw snippets of that late this year). Well also be looking to get more games into the kids.
During this period we need to maintain a solid core of experience to enable us to play the kids (without them getting smashed) and to drive standards (experience and corporate knowledge are vital).
I'm not advocating throwing the baby out with the bathwater like Melbourne did and destroying the culture.
I'm advocating a methodical and gradual release of players (with trade value that outweighs their value as experienced players) in order to bring in more talent.
You don't want to release them all at once (or even release all of them full stop). But we do need to release some where we can afford to in order to get the important part of the list (24 and under) in as good a shape as it can be.
We wouldn't have many of our rising stars this year if we hadn't have traded Touhy, Henderson, Yarran and Menzel (those trades got us the currency to either directly pick up Marchbank, Cuningham, Curnow, Picket, McKay, Plowman etc or meant we didn't have to sacrifice a low pick of our own for them and miss out on a player like SPS).
Losing Gibbs hurts our midfield and leadership short term but I'm more comfortable with those loses this year than I was last year due to the increased leadership of Cripps and Docherty and the improvement in the kids.
I value an extra mid 1st round pick higher than what I value the experience Gibbs provides for the next few years.
If that pick is the key to unlocking Kelly and/or Hopper then I'm even more on board.