And as I understood, the recording feature of MF 5 was supposed to be to a DAW via USB only, but it was also supposed to be bi-directional so you should be able to play multi-channel from your DAW out though your DL16s or DL32s. That's not the same as the DL32R.
Understood - that's how things are implemented on the new DLs - actually when connected to a DAW, the new models will behave just like the DL32R. They just don't have the additional ability to record to and play back from USB storage.
The one thing that I am addressing is that the DL32R has a button on its recording page that allows to switch all channels to Input B (for playing back tracks from your DAW into the individual channels) and then back to Input A (to use the physical inputs again). This button does not seem to exist for the DL16S and DL32S - they don't have a recording page.
I've had an online conversation with Mackie support - first they denied that virtual soundcheck was possible with the DLxxS devices, but then came around and confirmed that this is possible, but that currently you have to switch channels to Input B one by one in the individual channel view. They claimed the development team were working on a master button to switch all channels from A to B and back, so we might actually see an improvement in MF5.1
With MF5.0, doing a virtual soundcheck means flipping through all channels, setting their input to B, playing back the tracks from a DAW on your PC, then flipping through all channels again and setting their input to A again. Doable, but painful.
Fingers crossed for a simple button in MF5.1 - should be simple to add it to the routing pages "Input A" and "Input B" - just a button saying "All Inputs to A" or "All Inputs to B" respectively...