To the Echidna Post:
1) Proficiency bonus is either 2 or 3, not equal to a stat that will increase over time. Unarmed may have a proficiency already...
2) The Unarmed Fighter feat makes no sense as written. Even with loose interpretation, that becomes a rather large number. Ref13, AC13, Will10 becomes AC23. And that's a minimum will being better than plate!
To the Hedgehog Post:
Nice! Interesting indeed