The volatility inside games, as well as the fouling issue, make me the most nervous.
http://www.whatifsports.com/hd/GameResults/BoxScore.aspx?gid=5871082
In the linked game above, I fell behind by 29 with 6 1/2 mins left in the first half. Then, trailing by 23 with 17 1/2 mins left, I go on a 39-9 run over the next 12 mins, only to be outscored 23-9 in the last 5 minutes. I also committed 41 fouls (only the last 2 were intentional) - on the same night, I saw a box score with a zone team that committed only 3 total fous.
I intentionally did not redshirt any of my 4 freshmen this year, because I believe that to run FCP and FB you'll need a strong 10-12 man rotation between fatigue and fouls.
I don't necessarily think this is a flaw - just something that will take time for adjustment in the mindset of the fast pace coaches.