On the one hand, I really like Rage being a toggle that updates the character sheet with damage, resistance, and other effects. On the other hand, I have to hunt through Features for the toggle each time, as well as find multi-level effects separately and updating each applicable skill to STR manually.

Can we get all this pulled together under Bonus Action? 

It's the same with Innate Sorcery for sorcerers. I'd love it if I didn't have to click 3 times to turn it off. I then tend to forget to turn it back off and when I remember, it's another three clicks.

I'd love if it were consolidated somewhere that makes sense when on the main "Actions" tab.

My Barbarian player is constantly forgetting to turn this off because it's so buried.  Put it as a toggle under the charges on the main Features and Traits page.

And if you build the system right, you can add other things like a toggle for Mage Armor, or other buffs.

It's easier to just use a magic item to toggle the effect on and off. 

This definitely seems easier than their current solution, but there shouldn't be a need to have a homebrew item, or a manual toggle buried in an ability's details to switch a core class's feature on and off.