Doubling would mean you can get 14k a week easily. That would provide a lot of cosmetics since we have to wait for souls in order do any further upgrades. As this week would allow a person to have 1 level 3 and 3 level 2 upgrades. It takes two weeks with 15 a week in order to get the next upgrade. That would be 28k anima and leave 18k left over after buying the next level 3 upgrade (10k anima and 22 souls).
Yesterday I gained 1k anima in 50 mins of play and another 500 anima in less then 20 mins. I didn't time what it took for me to do the world boss and the calling elite WQ. That isn't a lot of play or really a grind. Could it be increased? Sure. But it is far from a grind or a problem right now. Most of the complaints are about not having everything right now.
That also ignores how the Renown vendor transmog set also has pieces locked behind renown still. So you wouldn't even be able to use the anima on stuff. There are people that are already capped on anima at 35k. That is a grind. But gaining 1k a day is far from a grind and just requires you to actually play the content. And most people keep saying the same thing over and over. They don't want to do with world quests. But they want the reward as if they did.