>>534153239
Bottom line up front:
>Your choice is, enjoy a possible 6-12+ second chaining stun, or purify a few times, but have barely any healing.

Gonna be real with you.. FL wise, as I can't speak for CChads..this is a hypothetical "I am the only DRK on my team", with 2 or a DNC, it gets even worse.
>Why the purify change is bad, scenario:
I play DRK exclusively..my pull and lock down on a team's bad placement means I am burning 2500 mana per person on your team..
(Assuming you didn't guard, but with enough aoe burst, guard means nothing)
>Your pull: I'll just run away or kick your teeth in
Correct, I will live or I will die... However; when my team follows up my pull with another volley of AOE CC, say a warrior does the stun after, a whm uses a laser (every 75 seconds), a bard will dump silence and lb into that group. (All these things hurt BAD) Stunning you again
>Ouch I need to get this shit off me
2 seconds isn't enough, you now have to choose, heal or purify with your remaining mana, IF you have any.. it is.. Not good, if purify lasted longer, maybe this would make sense.
There are simply too many CCs, not to mention classes that drain mana to make this an "kinda alright / different" change.
WHM, BRD, NIN, DNC will eat very well.
Spoiler:
The ninja is waiting to chain execute you and 5 others who can't heal to 50% now
>>534154976
Bard was never 'bad' in FL at least with it's utility, but you are spot on.
The more cc conditions you get on groups the better because that means they are wasting mana / actions / time on "not damage" which is how you your team wins.
>>534152579
>Knower
>>534156286
Do you not PvP? How else do you break a 10 second stun?