looking at those charts, and comparing them to the ways kstate has won under martin in past years, i'd say the number one problem has been ftr differential.
At first glance that would seem to be the case, but it really isn't. Year by year, only in 2010 did K-State have a positive FT rate differential in regular season Big 12 games, and that was 1.4%. This year is -5.7, last year was -3.9, 09 was -14.3 (!), and 08 was -2.6.
I also looked at the key point in individual games of whether K-State was +10% or better in FTR differential or -10% or worse, again these numbers are only in Big 12 regular season games. This year K-State is 4-1 when +10% or better and 2-5 when -10% or worse. For Frank's tenure the Cats are 19-4 when 10% or better and 17-18 when -10% or worse. So even in games where the opposing Big 12 team has a signficant advantage in FTR differential K-State is nearly .500 under Frank.