As I said…
The first is possible but there are certainly technical hurdles to this, non-trivial hurdles. Sorting handfuls of documents may be doable; sorting thousands of documents… much less easily accomplished.
So of course it has been discussed. But also, this isn’t even implemented DEVONthink-to-DEVONthink at this time. That would be the first step. However, even cracking that nut wouldn’t mean implementation in DEVONthink-to-DEVONthink To Go would be a simple port of some code. We aren’t just moving files in folders. Updates to transactional data and indices and recordkeeping has to be factored in in both situations.