A tweak I'd like to see is that from Lvl 200, the Concoctions Level in Alchemy goes up by 1 every 100 levels. Alchemy is with the current XP gaining already hard to grind, and the potions unlocked with Concoctions Levels are very popular to strive for if you're doing Alchemy, as I do. Maybe you can double the gaining OR change the levels when you level up Concoctions.
Thanks,
Adam