I much prefer the new crazed over the previous version. I hated having my units turn barb and suddenly start attacking me... at least now they'll get killed fighting someone else.
I do like Bumbar's suggestion of a limited duration for Crazed, so that affected units aren't running around aimlessly forever when there's no one to attack. And actually, I kind of wish Enraged caused you to become Crazed if the unit goes a set number of turns without attacking something, rather than at some random interval. This gives you an incentive to go around continuously attacking things with the Enraged unit (to keep it from going stir-crazy).
I do like Bumbar's suggestion of a limited duration for Crazed, so that affected units aren't running around aimlessly forever when there's no one to attack. And actually, I kind of wish Enraged caused you to become Crazed if the unit goes a set number of turns without attacking something, rather than at some random interval. This gives you an incentive to go around continuously attacking things with the Enraged unit (to keep it from going stir-crazy).