I'm curious. Why do you think there might be a chance for the mobile game essences and friendship levels to be in a mainline AC game? I feel like it is just a very obvious mobile game mechanic that wouldn't come into the actual game. Just like how Mario Odyessy wasn't like the Mario Run mobile game (like he didn't auto run or auto jump over enemies in Odyessy).
I feel like this is a bit of a bit of an unfair worry. I mean, it is animal crossing. You would fish, catch bugs, pick fruit, sell stuff, buy stuff, talk to villagers, do requests for villagers, write letters. We are probably going to see the museum back because we have seen fossils. I would be completely surprised if KK wasn't in the game because he has been in promotional material for the game. We have seen a baby Joan, so turnips are in. We have seen NPCs that look like they would be related to Nat and Chip, so we can probably expect a Bug Off and Fishing Tourney. Flowers look like they have a new growth system, so possibly a new way to get hybrids? We can collect and dress up in different clothes.
So, we can probably expect to do the same things just like any other animal crossing game. Just because they are adding a crafting mechanic doesn't mean that they are getting rid of what makes animal crossing special.