CFJ,
You want to substitute a WiFi connection between your computer and LocoNet instead of a LocoBuffer connection?
Remember, the LNWI is primarily intended to provide a mechanism for phones to control locomotives. So the communications protocol is focused on the messaging required to control locomotives.
While I have not specifically tested the LNWI and its communication protocol, I _suspect_ that the protocol used by the LNWI will not provide all of the capabilities of a LocoBuffer. For example, I would guess that you could _not_ apply firmware updates to your DCS210/DCS240/DT402/DT500/etc. via the LNWI communication protocol. This is just one of perhaps a hundred different LocoNet messages which I suspect cannot be communicated via the LNWI protocol.
Regards,
Billybob