Sens had a thin prospect pool were short on picks due to previous trades. They got good value to move down, which says that the Rangers likely had Miller very high.
With the benefit of hindsight Miller isn't even available in that spot.
Trading down also doesn't mean that the Senators didn't have Miller as the BPA at that spot. Teams sometimes have tiers of guys who are close together, or a few different options where they know they will get one.
If you go back to the 2015 draft, the Leafs offered Columbus 4 for 8, 34, 38, and 58. Columbus seemingly didn't take it because they seemed to indicate in the draft video that they had a good chance at getting one of the D at 8. So not trading up didn't mean they had Werenski higher than Hanifin, only that it wasn't worth burning those assets to get the BPA when their choice at 8 would fill a similar organizational need.ecen of inferior.
Sens clearly wanted to get a 1st round tier D but also needed to maximize assets. Dorion was still trying to trade back from the JBD position but got boxed in where Mann didn't want him to move back because they would risk dropping another tier..