Warbreaker was apparently written first just to get the story out there before Stormlight. I know he's said that at JCon before but a quick search query doesn't return anything.
I'm glad you didn't because I'm curious too and I just did a 10 minute deep dive into stuff and It really makes me want to get back into reading the books.
This way is fine, the other books, namely Warbreaker were written ahead of schedule to give character stores for within Stormlight. You can go in any order. If you start with SA, you get the fun of seeing a character then reading their book, and you pick up on a lot more nuance. It's really fine...