https://www.cbssports.com/college-basketball/news/candid-coaches-which-on-court-rule-change-should-come-next-to-mens-college-basketball/
If you could change one on-court rule, what would it be?
Advance the ball in final two minutes (after a team timeout) 28%
24-second shot clock 21%
Four quarters 20%
Instant replay/coaches challenge/improve monitor reviews 7%
FIBA goaltend rule 5%
Change the flop technical 4%
Also receiving multiple votes: Go to six fouls; reward five-second call for defense; widen the lane; bring back more physicality/hand checking.