2 analog sticks, input layout parity with Steam Deck, USB-C I guess. It also splits in half so you can use it more easily while cat sits in your lap.

The original Steam Controller was great for games that didn't support gamepads... and came out within like a year of "hey, we can actually map CRPGs, grand strategies, and RTSes to gamepads pretty well apparently?"

The Steam Deck is awesome because it is a best of both worlds. Sticks for games that map to those and trackpads for navigating the OS/Steam and for games that don't map well to sticks. And a gamepad form of the Steam Deck would be awesome, if only for letting those of us with fewer brain cells to only learn one scheme for a game rather than two or three.

This... is not that. Mechanically it is there (and it is a good ad for pcbway or whatever) but the ergonomics are just complete trash. The Steam Deck itself has shockingly awesome ergonomics (and is a great isometric exercise because that thing is a brick) because it is like holding a large hardcover book. Shrink that down and you are just straining your wrists . It is why basically every gamepad has flared "wings" these days. It softens the angle of your wrist while you hold it.