I would like to add a suggestion which seems easily implementable:

If you look at this Diablo 3 Hack

https://www.gosuguides.net/wp-content/uploads/2018/02/turbohud-features.jpg

at the Skill 1 it shows the cooldown in seconds in one big (single digit!) number. You can already resize the UI, so just showing the cooldown in seconds with one digit instead of decimal and centering it could a be a possible solution.

On another note, on the visibility of the healthglobe:

Having your own healthbar over your character would be very helpful too (possibly the size adjustable in the settings). My friend remarked that it is very easy to see if your teammate is dying, but difficult to see if you are dying yourself. Having the HP-Bar over the character is already implemented for your teammates, so maybe it would be easy to give the option to the players own character.
You could even go further and make a willpower/ragebar optional above it (at least for the player, not for the teammates), because I also found checking the willpower bar as annoying as the healthglobe. This would basically put you in a position to only have to look down if you need a cooldown timer and would be a huge addition to playing comfort which would then actually beat Diablo 3 and as far as I know POE too!