OP,

Thank you for sharing. I just finished reading your article. Although I strongly support and appreciate your intentions, I afraid your work is not matured enough to be discussed in detail. You need to keep working on it harder both in terms of design and representation, IMO. Some points for now:

1- Combining two very different approaches to cryptocurrency and blockchain is a bold choice but it won't work without extensive research on the very basic ideas behind the approaches.

2- You are absolutely silent about the networking layer: How pow miners and stake nodes should communicate for the miner to have the signed UNI from the specific node? What do we have to do with availability issues? IOW, what happens if the ode with the respective UNI is down?

3- What happens if the designated node is malfunctioning intentionally or not and declines to sign the appropriate message?