The thing about the Sens under Dorion/Murray is they weren't opposed to having a smaller winger or two at the NHL level (e.g. Dadonov, Ennis x2), they just didn't value them in the draft. This is, I believe, in large part because they believe/recognize that smaller wingers are the easiest assets to acquire through trade and free agency. When drafting, they prioritize positions and player types that are most difficult to acquire any other way. "You can't trade for this kind of player" was one of Trent Mann's go to lines.
All of which is to say, I don't see the Ostapchuk for Zetterlund trade as evidence that we're now more open to smaller wingers at the draft. If anything, it's evidence that philosophically things haven't changed - you draft big, you trade for small.