HFC Arms could be remembered as one of the best iteration just due to how stupid our kit was and how overpowered the tier bonus was before the nerf.
Which shouldn't be surprising at all, given how MS was the only damaging button we had and how spamming it over and over and over could lead to dumb results.
As it did.
Anyway yeah, Rage should matter, but as Sarri said, as long as we don't have any control on its income then it's bound to be a mechanic that leads to be desired.
As it stands Warriors would need to build Rage through some abilities and burn it through some others, leaving whites aside.