True has not been easy to speed UVA much the last few years.Vogt is going to be important in B1G play when we go up against some of the monster bigs in that league, just for the extra fouls he brings. But, he's "just a guy" right now, and he's still learning the UW defensive principles. He is being asked to mostly rebound and defend. The starting C, Crowl, is a bit more skilled offensively.
I am no expert on the defense, but it has always been about team principles - not aggressiveness. There are some good individual defenders, however, and you'll hear the announcers praise Wahl, in particular. They do not (traditionally) force many turnovers and are good on the defensive glass. The philosophy is to try to force hard twos (meaning inside the arc but outside the lane). They're not always successful at that, but have also been decent (not great) at shot blocking inside the lane.
Providence did zone UW and it was effective, and UW lost that game. However, that was also the one game that Johnny Davis did not play (MVP of the Maui tourney).
It is hard to speed up UW or really any team that is dedicated to a slower pace. Not saying impossible, but hard. Has to be done with pressure defense that results in getting turnovers and easy transition points.