There really aren’t that many units with inconsistent stances. Just a handful of exceptions like Streltsy and Maigadi. There’s totally room for improvement, but it’s not a major issue.
What is needed is to be more measured and consistent with unit design and stop making units who’s function is the exact opposite of what their stance indicates.
The worst offenders are the new ranged cavalry that counter light infantry (Mounted Riflemen, Mounted Infantry, etc). Making a unit that looks exactly like a Dragoon that hard counters all the normal counters for Dragoons is not okay at all even if their tags technically fit the counter system.
Counter Skirmishers are another big issue for readability and unit roles in general. There’s really nothing that visually distinguishes them from regular Skirmishers at all and their role is so hyper specialized that their usable niche is limited. It seems like they were added just for uniqueness without any regard for how they would look or work. The best solution I can think of is to link the role with dismounting units so they at least have something to make them stand out.
The last big readability issue would be shock infantry looking way too similar to speedy melee heavy infantry. There’s not really any intuitive or visual differentiation between Pirates and Barbary Corsairs that would justify them being different unit types. In this case it seems more like an unavoidable necessity if there’s going to be a cavalry equivalent for some civs. Ideally they could have restricted the unit type a bit more and limited it to units with short knives and clubs and an animal association (Coyote Runner, Tiger Claw, etc). But it’s too late when there’s already units with big swords like Pirates and Shotels. And even then there are heavy infantry units like Club Warriors that still might be ambiguous.
There are a few other confusing things like the ambiguity between mercenaries and outlaws. I think it would be justified to give Spies a bonus versus both to avoid the issue of getting smoked by an army who you thought were mercs but were actually outlaws.
Baffling changes like making Arrow Knights into heavy infantry also need to be reverted. Making them ranged shock infantry could fit their role, but a heavy infantry archer unit is ludicrous.