Men's Basketball Question: Defensive Approach

[BonzoGoesToCollege]

All year, we've played man and have switched almost every time off the high ball screen. This leaves our bigs out of position to rebound and creates mismatch nightmares because our guards are on the small side. When I watch really good defensive teams like Kentucky, it seems as it they rarely switch and their guards do a really good job working through screens. Anybody else notice this or have any comments on this?