Beat me to it, but this would seem reasonable to me.
It wouldn't be extremely overwhelming, 3 more DC on a purpose built build would help when there is no time to wait on 'Measure the Foe'. It could also be used to free up a few enhancement points currently being spent on upping Int, and allow a bit more variety for anyone that feels the 3 extra DC would get them where they need to be. Might allow for some mechanic/racial spending etc. It definitely couldn't hurt to have some flexibility. If, as CThuThe Ego states( and I have no doubt he is right), we can already get to a near no-fail EE DC, this would perhaps let some experimenting occur.