One of my issues with Tempest is that the gameplay doesn't feel rewarding, it's more of a fixed rotation were you go in an attunement, use all the abilities, overload, and move on.
What if instead of having separate overloads for each attunement, we instead had a F5 skill, perhaps with 2 charges or something, that would always be avalaible and would effectively overload the attunement we are currently in?
The effect of this would be fewer possible overloads over a long period of time, traded for the possibility of overloading right away without a 4 seconds delay. Overloading would then become a tool we use to create a "safe space" with 4 possible effects depending on the situation, rather than a mere additional AOE to squeeze in our rotation. It would introduce decision making: Do I use this overload to increase my DPS output, or does my group need more protection, healing, or might stacks at the moment?