Still cannot quickly see if my debuffs are on enemies.

[Skies]

It's also difficult for me to decipher if the effects on my team members are good effects or bad ones. I would love to know when to use esuna..

Well, there IS a way to notice it at a glance. Let's use the mockup as a base
Positive statuses look like an arrow pointing upwards (look at protect in the party screen) and negative statuses look like an arrow pointing downwards (look at the enemy's billion dots)

Takes a wee bit of training to discern at a glance but the 'square' part of both arrows is centered so when there are both positive and negative statuses on a target the positive statuses are as if they were edged upwards on relation to the negative statuses.