I didn't like having to repeat the tutorial from the demo, either. It felt very redundant, especially since the game was able to find the Splatoon 2 data. But it was really short, so it wasn't a huge deal.
I also leveled up to get to the new weapons. I really liked that I could get the higher-level weapons early. I was surprised that I could get guns above the level I had in Splatoon 2. I think the gun I ended up getting was a level 21 gun, where I only ever made it to level 20.
The card game was interesting. I tried a few rounds of it and even went into the deck builder. The deck building seemed like it could have more complexity than I'm willing to handle, but it's a cute little distraction. I weirdly had a hard time finding it in the town square. I couldn't get to it in the menu for whatever reason. But I guess that gave me a chance to walk around.
The new stages are really good. I was talking to a friend about how much we both enjoy them. Not sure I have a favorite just yet, but they feel like they fit right in while still feeling new and exciting.
2) I hated the "either or" for motion controls. Either I needed motion off, or I had motion without getting to use the second stick in tandem. I wanted something similar to how Breath of the Wild bow aiming was but it felt the opposite of that. I like using the stick, then motion to fine tune.
I'm pretty sure that's been the norm, at least since Splatoon 2. I'm not a huge fan of it either, but the controls still work well. I just have to play around with the sensitivity more.
Overall, I'm pretty excited to be playing Splatoon again.