They didn't carbon copy the teens in the show, some absolutely have similar traits but it's not all 1:1.

I think the appeal and point of doing That 90's Show is to lift from That 70's Show. Not sure why anyone would expect a different take. It's a new cast, new characters in the 90s with something familar. It should have a degree of sameness to it.

It's a comfort food comedy show.

Quality could be better but comedies/new casts need a minute to gel.