Yes and no.
Within the gacha game genre, it’s a pretty standard system, ripped almost directly from the one used in Honkai Impact 3. Nothing new there.
As far as open world games are concerned, it’s both standard setting and not. For a cross platform game that includes the mobile market, it’s absolutely set a new standard for world scale and content density.
Speaking to open worlds in general, its definitely shown the benefits of having a resource and activity dense open world, something that many games have infamously struggled with. However, it is by no means class leading in this regard.
Arguably its biggest achievement is proving that you don’t need ultra high detail and well textured graphics when you have a cast of cute anime characters with a strong story backing.