Hopefully they'll publish the manual soon, so we can get straight clear examples, but I think the integration isn't as nice as the HD500, but still easily workable. It looks like you'd use L6Link, and a midi cable. You would add the MIDI command in the patch to change your DT settings. You can even make a footswitch send a MIDI signal. So you could have a foot switch to flip Pentode/triode on the DT.
So, sounds like not perfect, but simple to replicate. I'd suggest to L6 that they include
a bunch of demo patches that include this kind of configuration.
A simple table of what MIDI commands to send to the DTs for each preamp model.
In the desktop editor, include an option to automatically add the appropriate MIDI commands if you have a DT.