buff and auras placement

There should be a way to move the key buffs you want to monitor during gameplay. Just like you added the hp bar overhead. There could be a way to either move wherever you want certain buffs or have them go right above your hp bar that is overhead of your character at the moment. This would let you monitor things much better and let you use your duration abilities much more efficiently.

I think the interface is long overdue for a revamp that would give you some customization options. It could also be at the bottom of the screen. Just another position on the screen where you can place buffs you really wish to monitor. Things like a granite flasks or vaal auras. Right now, the aura bar, is so far away from the actual action and is getting so many different buffs it is hard to actually know what is going on with them.
The effects around the character for things like curse immune or granite flask are a half measure. They help, but they aren't very precise and with other things going on, it gets hard to properly utilize. They are also inconsistent as some abilities have a visual and some others don't.

You could make it very simple, have a custom box, you can set the size, position, then the opacity, then to show timers or just a clock-type timer that goes around the buff, then you make a list in a buff tab in the options of all possible buffs your character can have and you get to check which ones go in the bar.
You could also get away with something much more simple, such as anything that isn't permanent goes in that box/overhead/bottom of screen.

Having to look up for your buffs, while monitoring your hp/mana at the bottom, all the while controling gameplay that is happening on the middle of the screen is very hard to do for the average person. Those customisable buffs would help a lot to reduce the brain power needed for proper gameplay.