I think these changes would border on "going overboard". Here's my specific feedback:

#1 - You're basically giving WAR PLD-esque CDs with this. Not to mention, from a semantic or lore perspective, why should WAR have "fist" abilities?
#2 - Why would you waste a cross-skill slot on Haymaker though?
#3 - This one I'd be okay with, but you'd need to give PLD something new to compensate for them losing this exclusively. I think it makes Flash more interesting when it can be used as a defensive CD of sorts.
#4 - Way too overpowered. You might be on to a good concept, but you'd need to lower the numbers, I think. I'd also argue it works better in reverse: add a parry buff to Defiance, and keep the healing buff with Wrath. It makes sense that a buffed Inner Beast trades a static +healing benefit for a large self-heal.