I'd argue mechanics like these are hard to spot because their display is so freaking tiny / easy to mistake for a class specific buff. You basically have to go off of the party list, which only displays 5 buffs & debuffs at a time and even then you need to specifically look out for that tiny blue stripe that indicates that's a cleansable debuff. Why can't cleansable debuffs be displayed like above the players head so its easier to spot just like health bars are when you're not full HP? This is totally a poached suggestion from Sarixis's recent Video discussing how to improve combat encounters with the most minimalistic amount of effort but its a really good one and the devs absolutely should consider it.
Then again, Interrupt mechanic display got overhauled for Tanks and they are still MIA so even if they did it there is a high chance of Esuna continueing to gather dust.