My view:
Match-ups were correct for Rance [Petrie - their key, lead-up forward] and Chaplin [Brown - as already explained why here by spook].
Then needed to play Grimes on Waite because he almost matches him for size, is very fast and agile, probably best spoiler and recovers brilliantly once it hits the ground. Waite is easily their most athletic tall forward. Batchelor had to take Higgins or resting mid, while Houli and Vlaustain took Nahas and other small forwards. Here is the problem as I see it. Dimma likes fixed ideas, same old, same old. Yes, it can be good to have a stable, regular back six. Or, can look at it another way, and have a wider range of flexible options to match-up according to the opposition. I have posted here a few times about the failure to get more games into Elton to develop another big (197 cm) backmen. Once Astbury returned to fitness and form in the VFL (took many marks and had decent possessions in some late games), same for him. If he proves really too slow etc. then we must make a decision on him. Same for Dea.
The contrast is Beveridge who gave games to nearly 40 players from bulldogs list. He treats them as an AFL squad, not bracketed as 1s and 2s who will only get a go if there are injuries. The advantages are obvious: flexible options - a more diverse, confident, experienced squad so you can choose best match-ups according to opp and conditions. We were clearly bothered by an outsized norf FL but, as usual, were just so predictable, fixed and rigid in planning. But, even then, on game day, Dimma still put Batch back on Waite. As others have said, could have also moved Griffiths down back on Petrie, freeing Rance for Waite. I am constantly frustrated by our strategic thinking or lack of. Every opp will go to the weakest link in the defence.