What are your thoughts on Aquaveil and Warden's after that change? I haven't really considered it and I'm not totally sure what it would change?
Perhaps I should have specified it, but I'm a CC player first and foremost, and pvp is primarily designed around CC. All of my points on Contradance usability, if you read them, are obviously made within the frame of CC.
But, if we have to extend it to FL, which is fair, then I don't see how this changes anything for DRK sinkholes. You don't need more than one purify to get out of salted earth, and then pray you'll not eat too much damage while doing so and die. On top of it, Contra in FL is a lot less about refreshing the charm and a lot more about snagging as many players as possible, even if they only get charmed for 2s it's enough to delete everybody.
Contra also isn't the only Guard remover, and a lot of coordinated groups use other things like Tenebrae or Primal Scream. If anything, while Contra has the most lethal effect, it's also the hardest to pull in FL because it takes ages to apply, which means going at the same time or before the DRK, and potentially get nuked to oblivion. A RPR or a WAR have a lot more safety built in as they're melees (way tougher), their effect is instantaneous, and a WAR for example can also apply stuff like rampage which is the new actual cheese that everybody seems to glance over.
But anyway, a lot of groups don't even have those jobs. They're the final nail in the coffin to secure kills, but they're not mandatory either.