I don’t know the answer to your TDP and PCIe config questions.
As far as RAM, right now we are committing to a single SO-DIMM slot (two slots would be nice though wouldn’t it?! 
).
As far as keyboard layouts go, we will only be offering English layouts for now. The way modern laptops are assembled, it’s non-trivial to swap out keyboards, which means if we offer multiple layouts, we end up needing to maintain a certain minimum quantity of the laptop with that layout in stock in the hopes that people from that region will order them. If we get sufficient demand for a particular layout though, we might be able to justify keeping it in stock in the future.