I agree his buildings weren't very pleasing aesthetically, and The Timeless Way of Building was embarrassing at points for the excuses he makes for poor execution, but his design patterns are very well-grounded IMO. I don't think you could just take them without any architectural sense and produce a decent structure, though all houses that I've found charming fit his ideas pretty neatly. The failure of A Pattern Language (IMO) is that he breaks things down into constituent pieces but fails to articulate a method for putting them into a cohesive (or tasteful) whole again. APL ends up being better viewed as a series of observations of things that generally work, than a system that produces successful buildings. He had inspiring ideas, but failed to achieve what he set out, and claimed, quite loudly, to do.
What he really hits on for me though is his fairly detailed critique of modern architecture. It's a disaster, and he was right to emphasize the impact it has on the people that have to live in and around it. I don't know how to describe it any other way than being psychically oppressive. His human-centric design approach was novel and may be needed more today than when he was writing about it.
Still making my way through his work, but I like him quite a bit, overall. He's not the final answer to architecture, but he has stimulating ideas.
Evans Basic English Code (uses English letters):
https://archive.org/details/evansbasicenglis00evan
Orthic (an alphabetic shorthand which replaces letters with more efficient characters):
https://orthic.shorthand.fun/