Thanks for insights!
Definitely planning to keep iterating on characters and adding new ones :).
I agree with your points.
Knight is strong, he is designed to be mostly in the easier levels, might be removed in later Ascensions/Difficulties. Also later planning to add characters that can mess with 'Immortality', so he might lose value when I add few characters. Will see.
Characters pointing themselves might be sometimes their only option, but I agree, it should probably be limited.