I think I sound like a broken record, but height is not that important, the critical thing is skillset and ability to play the position. Hill and DJW, for example, have more than decent height at PF (especially DJW). But they are both much better suited to play SF. Same with Finke, he is a stretch PF right now, not a C.
The other major parameter is overall and complementary talent. Villanova has great PGs (Arcidiacono and Brunson) both playing along each other very effectively, two great court generals who can also interchange at the PG/SG in the same lineup. In the frontcourt they have a very highly skilled 6'11"true C who really transformed his body adding strength. All three arguably among the best at their positions in college basketball. You add Hart and Jenkins at forwards, both highly ranked and talented players. Who cares about Jenkins' height?
Kenny Battle was the best PF in Illini history and one of the best in college basketball at the time at 6'6". But he was a PF, not a SF. And the surrounding talent on that team was great, masking even other positional gaps. If we had such great talent at PG and C as Villanova, even playing DJW at PF would't have mattered. You play DJW at PF (not his natural position) and have major gaps at PG and C, it is a different story.