The simple reason why this team doesn't blow a lot of bad teams out is depth. This is probably the second shortest bench Self has had at KU, amd the reality is it takes a lot of energy to keep up the pressure to blow out Big 12 teams on a nightly basis. Self has decided this year that allowing KI to build up a 10-15 point lead then slack a little is the best way to conserve energy throughout the year. When teams get up to a 20-25 point lead early, a lot of teams check out mentally and the comeback starts, they can't refocus. Keeping the leads in 10-15 point range means the lead isn't big enough to mentally check out on so they have to stay engaged. There's always the risk of that plan backfiring like it did against ISU, but there's also no foolproof plan either.
The 2007-08 team could runaway from everyone because Self had the depth to play fast all the time. This team doesn't have the depth to that even before the UA injury. This team has to find ways to conserve energy during games because Mason and Lucas especially are going to play 35+ mpg the rest of the way fouls permitting.