Actually to add to this let’s not forget that like the Zoanoids and even most life on Earth, Arch’s connection to the Uranus is something that was manufactured into him. The psychic links and the power to control others in guyver all seems to based around manufactured susceptibility. Arch and the Zoalords cannot control normal humans as far as I’ve seen, and Apton evolved beyond being a zoanoid, he’s now a new creature with his link severed. Even the Guyver likely falls into this category.
The guyver is stated to free it’s host from the Uranus’s psychic commands but if the rest of the series is anything to go by, their power to control humans is also designed. Which raises the question of will the guyver be able to protect its host from psychic power that originated from a different universe, ones not bound by its universes laws. By extension Arch’s never had his mind pitted again a being who doesn’t play by the same rules either.