The Linux kernel has been updated for some new hardware that still includes the AMD Van Gogh APU, which is currently only used in the Steam Deck. Popular speculation is that Valve will release an updated Steam Deck, one that still uses the same APU (so same performance), but had other changes to the hardware. Possibly different screen, larger battery, etc.
Possible code name for the hardware is Galileo.
If you want more/better info, I’d recommend reading the linked article.
I think adding a second USB C port on the bottom would solve that, as well as other gripes. You would still have a “more seamless docking experience” because you can just set the device in the dock on the upward-facing USB C interface (like a Switch), as opposed to the current method of setting it in the dock and then plugging in a cable with a separate action. Then you would also have a second USB port (no longer requiring the use of a hub in some situations) and using a USB port on the bottom is oftentimes better than on the top.