Warning: Long and somewhat rambling post ahead!
Personally I think the big thing being lost in the discussion about the plethora of dogs mids is the reduced interchange cap. Clubs aren't going to be able to do short, sharp changes as often so they will need to be strategic about how they bench players and for how long.
Assuming an average AFL quarter length of ~28mins, then there is a total of 112 "bench minutes" per quarter. If 3 players manage to play close to 100% game time (ultra fit, or KPP which can often stay out the majority of the game, etc) then there would be roughly 1 change for each of the 19 players left (75 changes/4 = ~19 per quarter). I reckon it's unlikely someone like Treloar would play exclusively mid except for 1 brief sub for 2-3 minutes as that would mean close to 25 minutes of pure mid time!
What I reckon is more likely is the 7 gun mids (Treloar, Macrae, Bont, Dunkley, Libba, Hunter, Smith) being looked at across 7 positions:
Rover 1
Rover 2
Centre
Wing 1
Wing 2
Somewhere forward
Bench
They will have a starting position which going off the common themes across the site/SC articles I've read looks something like:
Rover 1 Bont
Rover 2 Treloar
Centre Libba
Wing 1 Hunter
Wing 2 Macrae
Forward Dunkley
Bench Smith
And they will effectively cycle as a group, with 1 exception. Hunter is a pure wingman and isn't really suited to any of the other spots (maybe forward).. but I can see it being a case of (sticking with a 28min average for quarters):
Hunter: plays pure wing for 85% of the quarter (~24 mins) and then spends 15% on the bench (~4 mins)
Which means we have a combined 32 "wing minutes" left (across 28mins from wing 2 plus the 4 mins Hunter is on the bench). These I think get split pretty evenly across the two next most logical wingmen - Macrae and Smith.
Macrae - wing 16mins, bench 4 mins.. leaves him 8 minutes
Smith - wing 16 mins (Hunter's wing for 4 mins, Macrae's for the other 12), bench 4 mins.. leaves him 8 minutes.. but given he was on the bench to start, him coming off would be his first rotation under the cap, meaning he likely gets a second spell (for ease, another 4 mins) to end the quarter, and 4 minutes of pure mid time.
If Macrae spends his remaining 8 minutes in the "pure mid" spots (Rovers 1&2, Centre) plus Smith gets 4 mins there, then there is 72 minutes of pure mid time remaining (3 positions x 28 minutes = 84 mins - Macrae/Smith 12 mins = 72 mins).
And we have 4 guys left.. Treloar, Bont, Libba, Dunkley. This will always be open to personal opinion, but the way I see this breaking down is:
Treloar - 20 mins pure mid, 4 mins on the bench, and 4 mins resting forward as a 2nd spell. He is really a mid only type player in my opinion, so it stands to reason he plays majority of his time in the middle.
Bont - 20 mins pure mid 4 mins on the bench and 4 mins resting forward as a 2nd spell. Premier player on their list and we saw what he did in the second half of last year.. he's elite. That said, he is one of the one's I am least confident in my assessment of and can easily see him having extra forward time and the expense of some pure mid time.
Libba - 16 mins as a pure mid as I think he compliments some of the other guys that will cycle through the mids, but is also less suited to going forward effectively in my opinion. his last 12 mins are spent on the bench (4 mins) and resting forward (8 mins). I can see Bont and Libba swapping their forward mins around.
Dunkley - Dunkley skips on bench time as he spends a little more time forward (12 mins) 16 mins pure mid. May still get a small rotation, but I think if he does it comes at the expense of forward time and doesn't impact his pure mid time too much.
Basically in a table...
View attachment 25791
Now I know it'll never work out that perfectly.. players will get stuck on the bench longer.. injuries will happen.. or just random footy chaos. Not to mention there may be other players who rotate in these spots (I hope not!) but what I did want to highlight is that there should be enough minutes to go around for certain players to score well, while others will definitely be impacted in their role (eg, Macrae).
It's also worth calling out this is a 1 quarter view and the split could change quarter by quarter, plus there is A LOT of assumptions that underpin these ideas, but.. and this is the big one.. it gives me confidence in someone like Dunkley getting enough pure mid minutes to remove any doubts about him being a lock!