Hello, everyone. I've been doing some research and I felt it was a good idea to share some findings with you all.
I'm sure you've all noticed some changes, beyond that of the D-Comm. We all have a seperate digivice, and it seems to vary from person to person. From what I can tell, there at least four "archetypes" of digivice, which those from Witchelny say are called the "Soul", "Matrix," "Spirit, and "Xros Digivices."
I'd like to focus on the latter two, as they are the most starkly different from what we're used to. The Spirit Digivice seems to be based on the methods used by several individuals from a certain world, that were once present here before being sent home. From what they told us, they were able to use items called "Spirits" to evolve into digimon, rather than have a digimon partner. In this case, Yggdrasil has seemed to have replicated this method, and given two spirits to Tamers that have a Spirit Digivice.
The next is... rather interesting. The "Xros Digivice" seems to activate a process similar to evolution, except... well, the digimon are not actually evolving. Rather, they are uniting and becoming stronger. However, unlike Jogress, where two digimon become a single being, with this method of advancement, a single digimon seems to act as the core of the combination. Details are sketchy, but it seems as they grow in strength, the number of possible combinations will increase. Furthermore, Tamers with this sort of digivice seem to have more than one "partner", as it were. It seems they've all had their strength limited to the Adult level, however.
For those Tamers with a Soul Digivice, not much seems to have changed, besides a need to insert digi-soul to evolve our digimon. As for those with a Matrix digivice, from what I can tell, their focus is now on playing a support role through the use of supplied "option cards" and greater defensive options.
That is... all the general information I can provide. I only hope this has been of some use to everyone.