I liked all those updates, too, but the stories would not be as effective if they didn’t have a modern twist to them.
I haven’t read much of the Percy Jackson books - only snippets when my kids left the books around - but the cute touches with the mythology are a big part of the appeal, just as the playfulness in the setting of Harry Potter makes it much more worthwhile.
I like to get Young Adult or even children’s fantasy. A good writer can tell a complex and psychologically sophisticated story within the parameters of those library-classifications.