There's another situation where this would be useful too. I don't play with a mouse and whenever I'm learning a new encounter I end up having to tell my team to read out what their debuffs actually do until I have memorised the icon because virtual mouse mode is so clunky during a tight healing situation. We had a hilarious time learning T9 when our lovely warrior kept slaughtering us all by bringing an exploding debuff into the stacked group until I told them to tell me what the debuff said and they embarrassedly dictated the warning from the tooltip I couldn't see.

Ok, in that situation it wasn't something I could easily check anyway (the interface for using cannon abilities and reading ally debuffs is awful without a mouse) but perhaps if the data was more easily available it would help everyone pay more attention to their debuffs in general.