This has been mentioned in the prelude thread:
Questing giving quality bonuses is just a stupid mechanic.
Either you do none - some questing (Like 99% of the playerbase due to questing being annoying at best, and tedious af at worst) and those gains are basically non existent, i literally never noticed the ql increase mattering (I don't play after like 3-4 months lol) until it was brought up in that thread.
Or you abuse the shit out of it and do it 24/7 for months and then you can get ridiculous level of ql on some random ass animal or plant.
If the mechanic is not good unless you abuse the shit out of it, it shouldn't exist to begin with. Just leave quests (I'd prefer their removal but that's my subjective opinion) as something that can help you out with hunger/lp/xp and sometimes give a nice gild, there is no need for it to be a way to raise the quality of X to 1000.
Edit: Forgot to mention one thing, for people who won't be grinding quests for the quality but are instead doing them for some short-term gain like lp/xp/hunger, the ql increase rewards just feel like a slap to the face (if i get +1ql of dandelions after doing 6 objectives because i want some xp/lp early on i'm 200% more likely to kill the next hermit i see).
Edit2: A possible compromise that i've arrived at is to limit the ql increases up to the max "natural" ql (max ql they could possibly spawn with on their own), ie. foragables around 40-50ql, bears/mooses around 300ql, etc. Also make them a secondary reward on top of a normal reward (refer to first edit).