TL;DR
Make Quality work without a Percentage chance and better ease people into Higher Levels of Quality.What?
Instead of Quality being a Chance to Rank up a level with even smaller chances to skip levels, have Quality be a White Bar that fills up above the Green Bar when the machine is actively crafting something, similarly to how Productivity's Pink Bar fills up below the Green bar. The higher the percentage of quality in the Quality Modules the faster it fills up.Unlike Productivity though once the White Bar fills up it is not instantly consumed, instead it is consumed once the Green Bar or the Pink Bar (If Productivity is active as well) fills up and creates the item. When this happens the Quality of the item goes up by 1. The same happens with Recyclers, once the White Bar is Filled up the next time the item is recycled, the Quality of the Parts you get back Go up by 1.
If the Recipe is changed or the item the Recycler is Recycling is changed the Bar will reset so you can't do any shenanigans with upgrading Quality.
Quality cannot Jump in Rank at all, it can only go into the next rank after it.
As well, Quality ranks instead can be introduced a bit later and more linearly than they are now, and make Quality not as fast early on. Uncommon Quality and Tier 1 Quality Modules can be introduced with Space Science Rather than Green Science and the Tier 1 Quality Modules only has 0.5% Quality Attached to it.
You get the Rare Quality and Tier 2 Quality Modules with Electromagnetic Science and researching Tier 1 Quality Modules. The Tier 2 Quality Modules has 1% Quality attached to it.
You get the Epic Quality and the Tier 3 Quality Modules with Electromagnetic, Agriculture Science and Tier 1 and 2 Quality Modules Researched. Keep Tier 3 Quality Modules having a 2.5% Quality attached.
Legendary Quality can stay where it is on the Tech Tree.
Why?
The main reason why I really want these changes is because I think the way Quality is Unlocked and higher quality machines and items are made in General right now is very flawed.With Quality being a Percentage chance right now it can lead not only lead to bad habits forming like gambling away many resources or reloading a save to get a higher quality item or building you want, but it also means that a lot of getting higher Quality can be dependent on luck. You can get unlucky with the chances and use loads of resources to get only 1 Legendary even with Recyclers or you can get very lucky and spend very little to get multiple Legendary Items, even if the odds are low.
Something in Factorio that Encourages gambling and hoping to get lucky via burning resources or reloading saves is not that Fun.
While Something like Uranium processing does have a Chance to get you what you want, there is tech that completely removes the chance from the Equation and makes Uranium Power, Weapons, and Tech far more fun to get. Quality doesn't have an equivalent to Koverax Enrichment and the Recycler with Quality is still a Chance to upgrade, so while RNG is lesser with the Recycler is still a noticable factor in getting the stuff you want at a good pace.
I want these changes to make Quality far More probabilistic and not rely on luck to get higher quality items, especially earlier on when you don't have Recyclers yet.
I also wanted to change the progression on how you got Higher Quality Modules and Higher Quality as well as how Strong the Tier 1 and 2 Quality Modules were because I want people to be eased more into Quality, so they Don't have to worry about trying to get the Rare stuff earlier on with them only being able to get Uncommon stuff until they get Electromagnetic Science and therefor the Recycler.
Making the Other Quality Modules other than Tier 3 Weaker as well is an attempt by me to make the Tier 3 Quality Module feel more Important as the Tier 3 Module currently is only 0.5% Strong than the Tier 2 one, so people may not even bother with Tier 3 and just Rank Up Tier 2 in Quality instead.
Weakening the Tier 1 and 2 Modules also makes the Recycler still feel important with the Chance to upgrade being removed entirely. It also makes building Upcyclers far less clunky to build because you don't have to worry about Recyclers Making 5 Different Tiers of items, making it easier to build one.
I want Quality to not be a chance to make something While Keeping how expensive it should be to make high quality buildings and items, making the mechanic overall far more fun than it currently is.

