Broad has become a very good player and would be one of the first selected in the backline so whilst I see what Moppey is saying, the really big forward that play out of the goal square like the King Bros would be taken by Miller over Broad, Tarrant might get first crack which makes Miller behind both. Miller might get a go when there are multiple talls that play deep. Reckon the 5-10 game mark might be his go this year.I liked Miller's debut but is behind Broad, Balta & Tarrant for a spot in the 23. We often select players to suit our game plan. As you say Broad can play on smaller types. I've seen him play on Hipwood too.
Game vs Lions this year we had Garth, Grimes & Astbury vs 200cm Daniher & Fullarton. Plus McStay.
The 3rd key fwd is a huge question too. Do we play 2 rucks? I guess we'll have to watch practice games to get a sense of what selectors have come up with