Plus the emphasis on "athleticism" due to the change in the way fouls ar called. So much hand checking and grabbing now limits the flow. There is a lot of NBA influence with pick and roll or drive and dish to highlight players "playmaking" abilities in the game now too. The college game has become alot more about the player versus the team.
Your earlier comment about the 45 vs 30 shot clock is also spot on. It was added to increasing scoring, but did it? Watching IU's 87 run, they had several games in the 100s. I have also been watching some old Evansville games from 1989, they had 10 games where they scored 88 or more. Heck, one game they score 109 and another they scored 115.
To further illustrated you point about the mid-range, IU scored 97 vs UNLV in the '87 semi and only attempted 4 threes, making 2.