Yah not going to get this, pretty useless, sorry, or rather a slap in the face for those who have limited playspace/roomscale. I would LOVE this boost for SOME potions, easy/single ones with few ingredients!
For potions with like 12 ingredients it was mentioned before that it is real hard to reach them all. So for these I mostly open my chest to sort them closer to the cauldron in between. It is way too risky to loose a 10x over a permanent perk like this
There should rather be a button directly at the cauldron-desk, if we press it it turns green and the speed goes up to the perk level aquired, another press turns it off.
PS: The other 2 are good ideas, specially the dram cap one which often is needed by players who got lots of overlevel perks to spend as well; 1M would not help that much, though, there I agree with Ricknees below.