In a recent podcast on Russian gamemag.ru, they talked to Evgeniy Grygorovych. Unfortunately, there is no English subtitle for the video, but condor_ukr (the community manager of the game) said the following topics were covered in the conversation:
The multiplayer players rank system will be more similar to the rank system of the first Cossacks.
Collector’s Edition will be and it will be developed by competent in such matters dealers.
Modders will get the codes of the game scripts.