The OLED dock has an Ethernet port. They’ll work with non-OLED switches so you could buy one if you need the port.

The two USB’s on the side of the case seem sufficient for most use cases. Might be able to add a tiny usb hub if need be, there’s a few tiny ones fore less than $9.

Ergonomics are a bit odd, but the 3DS had similar issues as well. I ended up 3d printing ergonomics grips for my 3ds and I know they have something similar for the switch. I feel like they were towing a line between OTG usability and being able to hold the joycons in multiple orientations (think just dance, 1-2 switch, Mario party, 51 games, etc), or in different accessories (not sure how well an ergo one would work in a leg strap with the ring fit).

Edit: also the first thing I did was buy a cheap 128GB micro SD and never look back. Sure it probably would her been nice if it wasn’t needed, but it’s swappable and it’s cheaper than if they built it in.