Personally, I really do agree with what you said about relying on formulaic writing. Maybe it's just cause I'm old, but I really don't like how, in order to get published or noticed these days, it feels like you have to construct a story in a particular way (which really encourages writers to be as uncreative as possible). Like, a writer has to hit all of these cliche beats in order for someone to read their book or to get it published. I don't think there's any one way (genre fiction or not) that a book has to start out, or any particular rules you have to follow in order to make a successful story. It all depends on the execution.
A really great example of a book that is formulaic to its core vs. a book that come from a beautiful spark of imagination and genuine passion is Eragon vs. Dune. I know this is a really weird example, but they're what I've been reading lately so I'm going to use them, anyway.
Now, while ten-year-old me really loved Eragon, it's really hard for old me to continue reading the series because the cliches that made Eragon easily digestible to ten-year-old me kind of make old me want to blanch. It's predictable, soulless writing to its core (albeit well written, technically). It really did feel like Mr. Paolini (who I have nothing against and I actually want to read his newest book that's coming out) was just yanking out pieces and threads of what makes other series like Star Wars and Lord of the Rings great and combining them into this... book loaf XD.
Dune on the other hand truly does feel like this fevered dream of pure imagination that does not rely on "Rules" of writing and kind of just did its own thing because that's the story Frank Herbert wanted to tell in his own way. It is so much more engaging and fascinating to read because of this. Like, the book had me at the wonderful Gom Jabbar ritual. 
That being said, I think so long as you are just telling the story you want to tell and not telling it because some stuffy school teacher (or some know-it-all Youtuber) told you to follow some weird arbitrary rule about writing, you'll do fine, even if you do fall into a few tropes or cliches while doing it. However, if you are purposely constructing a story to be cliched because you know it will sell, it will probably end up being pretty soulless.
Personal venting aside, I would really need to read the story to gauge whether the criticism is valid or not shrug. From the sound of it, I like the idea of introducing your characters separately (six is a lot to throw at a read in bulk) so long as you construct them as really interesting and make the reader want to learn more about them. If you want my opinion on it, I'm willing to do a read-for-read, but I won't give you a criticism without your permission, of course.