I don’t think Knights are overpowered and so require a nerf. They’re powerful, yes, but not overpowered.
Knights need to be powerful. In principle, the game actually makes you work hard to get them - you need iron, you need to research a tech path that is focused on military not infrastructure, you need two builders to make six farms for the eureka (plus researching the rest of Feudalism), and then you need to build them. [...] Where it goes wrong is this: [...]You ideally shouldn't actually have that many Knights. Just a few to help bolster your existing melee (or whatever) army. Knights should be like Varu - you have a few, they’re powerful, it there not your whole army. [...] They just need to be harder to get, harder to build in large numbers, and have better counters.