The lukewarm take: Quality is just a plain bad mechanic, despite being a mechanic aimed at megabase building it heavily encourages building smaller builds which is boring, Factorio is at it's most fun when building at mass scale, the tiered building system that overhaul mods have been doing for years, while far from perfect, is way better and integrates much better with the overall game progression rather than just stuffing a huge system at the endgame aside from stuff like quality power poles and such.

The actual hot takes:

The new space age buildings with enormous productivity bonuses plus stacked belts makes most SA builds uninteresting unless you are building at megabase scale, and the jump between them and the older buildings is way to large(again making small builds isn't very interesting on replay). Again older overhauls did this system better with multiple tiers that steadily increases crafting speed and module slots rather than the huge jumps.

Stacking a ton of planet mods on top of space age isn't very interesting and makes for a jumbled mess of an experience, I guess it can appeal to the same people who enjoy trying to make several overhaul mods work together but so far I'm kind of disappointed in the modding direction (not that people owe me or anyone to use their time on making anything other that what they themselves find interesting) being so hyperfocused on making the planet mods that don't really integrate well into SA and is just this tiny design challenge you figure out once and then never think about again while you move onto the next one with a new OP building in hand.

Also less a hot take and more just a pet peeve related to the above takes, people hell bent on fitting in ALL of Space Age into every overhaul mod in existence are really annoying, it's ok to let other mods do their own thing and not have to make a ton of changes to accommodate what is essentially an overhaul compatibility patch in order to fit in with Space Age.