this is about the cable runs and about making everything internal
Totally agree and I think this is going to lead to the adoption of hose connectors so you can have a fluid filled hose/tube in the frame and just unplug the caliper and lever without the introduction of air to, or loss of fluid from, the system.
The adoption of discs on road bikes is going to push the development (or maybe that should be refinement) of little things, that we didn’t know we wanted/needed, that will make tasks like wheel swapping and replacing damaged levers quicker and easier IMHO – if changing wheels with discs turns out to be as time consuming as some seem to think it will it won’t take long for the teams to push their sponsors to improve it. I can see disc mount positioning on hubs to be one of the first things that get standardised, either that or quick and reliable caliper re-alignment.