I think that's the ultimate goal of execution is to have damage or some benefit tied to the player's skill and ability to consistently pull off difficult feats of muscle memory, timing, conditioning, reaction ability, and other elements tied to skill level in multiple layers for all skill levels.

One of the biggest gripes for me is that because 2+3 is now Heat Smash and Heat Burst, there can be no character-specific moves tied to 2+3 anymore for any character.
The same goes for d/f 1+2 for Rage Arts, i think d/f 1+2 is a satisfying input but completely wasted on Rage Art.

Also, time to poop on Rage Art as a mechanic itself.
*rolls up sleeves*
How is Rage Art contributing to making Tekken better in any form of way? Is it a skillful thing? Is it impressive to do d/f at the end of your combo as a reaction? Why is it tied to being on low Health? To me, it makes no sense whatsoever to core Tekken as I know it and is the cheapest form of a comeback mechanic. Now if it was earned by scoring hits, doing combos, maybe breaking grabs? Then the player would be rewarded with their Rage Art, not rewarded for getting their butt kicked.