3300 euros is not enough, that obtaining a license and building in Estonia to start work is not expensive, I do not think that a company that wants to start seriously in the activity of encryption does not contain more than 1 bitcoin as founding liquidity.
Are there any legal documents, more restrictions, or just an increase in taxes?
This is a good thing in my opinion, because this will be a good measure to prevent illicit activities, the bureaucracy does have its benefit sometimes. I do not know much about documents though but if I were to deduce there will be more documentations as expected of prolonged registration, I am pretty sure that it will come with more follow-ups.