Can anyone tell me how decentralized is this Universa Blockchain ?

Since,
In Universa, proof-of-state (not to be confused with proof-of-stake) mechanism is used instead of a more commonly implemented proof-of-work system. A change in state change is verified by a trusted actor and approved by consensus in ten milliseconds or less. Each separate contract maintains its own chain of state, so a contract can perform actions asynchronously without affecting other contracts. The combined changes of state form a directed acyclic graph, which makes up the blockchain itself.

The proof-of-state system and the licensed nodes can be perceived as moving away from decentralization. This mechanism is meant to develop a convenient business solution in a broad sense, which can "break the very philosophy of the blockchain."

So who is that trusted actor, how can one become "licensed" node ? Does that mean I will have to pay to universa to become a node, can they refuse someone who wants to be a node ?. Looks like it wont be so easy to become a node like in bitcoin and Universa team is going to decide who will be validating the transactions and who wont ? Explane someone please. Thx