VT is an excellent shooting team with 4 high volume 3pt shooters above or around 40%, along with 2 other moderate volume 3pt shooters who are in the mid-to-high 30s.
I assume their shot chart is Rockets-ey, since they're also #5 in the country at 2pt%, which makes me think they get tons of layups. And of course after checking hoop-math, yes, it's confirmed that Buzz has his guys taking the 4th lowest rate of midrange jumpers in the country.
This is not the most talented offense Duke will face, but it's one of the very best coached and best run. Their goal is to get layups and 3s. Schematically, this is a great test for Duke's defense, and although no one in the NBA would ever play 2-3 zone against the Rockets even if it were legal, it may be Duke's only hope, given how broken the m2m could be against an offense like this.
VT is a poor offensive rebounding team, which may allow Duke's terrible defensive rebounding to not lose the game, even in zone.
On defense, VT suffers from a poor turnover rate, so probably not aggressive on the perimeter. Should allow Allen to be more comfortable running the point and lessen the need for Duval.