Hello
as a quality of Life improvement i would really enjoy an Button to switch my enemy list to a tank mode. This means the following:

green: i have aggro on the mob everythin is fine
orange: i still have aggro on the mob but somebody clmes close (e.g. up to 70% of my aggro level)
red: i lost aggro to someone

especially the orange marker would help me a lot to find mobs i am close to loose aggro on. A huge improvement because today i need to tab between targets to find out if a dps is sneaking to my aggro niveau, especially in 8 man or 24 man content.