Resource management can be fun for sure, though this change was inevitable given SE's current design philosophy.

Any form of actual resource "management" has been stripped out of the game over the last few expansions. To the point where skills which use resources are basically just another cooldown.

For a world where an ability gives resource instead of a buff to make sense we need to have more diverse resource management in general. Or really any resource management at all. Multiple resource spenders with different gauge costs, and variable resource builders with procs that allow for different amounts of resource to be gained under certain conditions. This just isn't the world we live in with the over-simplified job design right now, sadly.