Daily Punch 6-16-15 Force of Will feat for DnD 5e

I liked the 4e DnD ideas of Will saves being Charisma or Wisdom.  Let’s see if we can’t bring that back…

Force of Will

Your mind is a fortress unto its own.  Gain the following benefits:

• Wisdom saving throws can be made using your Charisma modifier, and Charisma saving throws can be made using your Wisdom modifier.
• If you add your proficiency bonus to both Charisma and Wisdom saving throws, add 1 and 1/2 (rounded down) your proficiency bonus instead.

Thoughts?