Tanks are too strong without a doubt, but that's a tank problem in my eyes. If everyone is self sufficient, then playing healer/support is never going to feel meaningful. The fix needs to be more reasonable limitations on mitigation and self healing. Moving beyond the tank issue, I don't find the support cards completely useless and more time with AST has made me appreciate what was done in DT. I like having the option to hold Bole/Spire/etc to heal unexpected damage even if that's not always common. I also don't mind throwing them on the tank if draw is coming up again. At least they do something.
Minor Arcana is what I find least interesting now. I think that ability would be more fun if it augmented the other cards. Press once to increase card effect for reduced duration, press twice to set the card effect to be AoE, press a third time and the card goes back to normal. It would be similar to the old Royal Road but would get around the issue of some cards being used only to buff and never being played for their own effect.