I'm on the fence about quality now. I really, really dislike the recycler and asteroid processing spamming as the endgame. But is it going to too hard to bother now? Will having to deal with the rare exceptions of actually having a quality item pop out be worth all the extra logic?
Running upcycling loops for specific items and materials you focus on is the way to go. Upcycling blue chips is going to continue be overpowered, which nets you high quality of them and their components..
With that said, you can play without quality just fun and playing SE without quality is great too.
Washing ore is probably the easiest solution - research high levels of mining productivity, put quality modules in drills, filter off uncommon+, and loop them through recyclers until they are at the desired quality level.
It’s inefficient but has a very low cognitive load.
You can improve the efficiency a little by increasing the quality floor each level, eg rare iron ore, epic iron plate, legendary steel. But in my post endgame playthrough I was drowning in so much legendary ore with this method I didn’t bother.
The crushers could be vastly improved by treating recipes as a filter.
I don't think it'll be too hard; you can build infinite legendary iron from just a dozen or so foundries on Vulcanus. Legendary coal and stone are not much harder, and from legendary coal you get legendary plastic and then legendary steel and copper via the LDS shuffle. It's not quite as broken as the asteroid casinos and feels much more factorio-y IMO.
Avadii made a great guide about good ways to farm legendaries in 2.1: https://www.youtube.com/watch?v=ZuwBnOsULkc