In theory the re-ordering should only happen in the presence of packetloss, which is exactly what you want. Could be worth an experiment, anyway. Your suggest

In theory the re-ordering should only happen in the presence of packetloss, which is exactly what you want. Could be worth an experiment, anyway. Your suggestion is how some "WAN optimisation" network middleboxes work (transparently terminating the TCP in the middlebox itself). To do that with Wireguard you'd have to implement that in the Linux kernel.