Didn't say I rated him higher than Sheed at all. What logic are you referring to?
Sheed is a year older for starters and has an additional year of development, but that's not the point.
Point is that three good inside mids are better than two.
I guess my only criticism of this point would be that putting an emphasis on drafting midfielders, in order to adress current deficiencies, undermines the broader long-term objective of developing a balanced, well-rounded list. In this sense, their is an opportunity cost associated with drafting - by focussing on one deficiency you ultimately create others down the track.
Unbalanced lists rarely ever become Premiership teams. Fremantle, more so than any other team that comes to mind, have relied immensely on their midfield to win games for long time (their defence has also been good- i'll give you that).
So back to your original point, although i agree that, in isolation, 3 good inside mids are better than two - I'd back a more balanced list e.g. 2 good inside mids and a good forward/defender/wingman etc to beat the former more often than not.