Nerfing mobility enhance would be fine, if we could actually run fast while using it. At the moment Crysis 1's speed mode absolutely destroys it. In speed mode you could reload faster, walk/swim/run faster; and only sprinting drained energy.
We need normal sprint and a faster power sprint.I agree, a 'power sprint' option would be pretty cool, maybe you double-tap sprint and it engages for a satisfying rampage-sprint with limited turning ability that when combined with armour mode could actually be used to bull rush opponents to damage and knock them away.