I understand your need … I posted the similar issue some months ago: I usually work with an RME interface, but sometimes - when recording from my Motif XF, I use the Yamaha Firewiredriver (for obvious reasons). I understand that they cannot be used at the same time, but I would love to see that switching the driver in cubase automatically selects a corresponding set of presets for the audio connections! The automatism cubase uses when we switch interface in one project makes it almost impossible to work this way. The problem is even bigger since there is no common preset for all audio connections, but instead one set per type (input, output, etc.).
The simple straight forward solution would be that the audio connections presets are internally linked to one audio interface. So by switching the audio interface in the project simply changes the audio connections to whatever we have prepared.
That would be very, very helpful!