Currently I’m fine since my 32Ch have some space to record Groups and separated channels in parallel, so I can easily record the individuals from Ch19 and up and map my premixes to the lower streams (works quite fine!). But events will come that need recording of nearly all channels available and these are the ones I really have to ensure there is some high level recording in the end, even if the host recording fails for some reasons (happened once in a video production, luckily files could been recovered manually…).
Not sure if independent mappings will consume more DSP power, since audio streaming and USB Block Devices handled pretty different. I assume there is only very little to be shared regarding performance.
But, hey, this is only a feature suggestion, not an urgent issue… 😉