I have several questions about Quandela’s way of solving a QUBO problem:

First of all, is your implementation here : The shortest path problem using QUBO — perceval 0.10.2 documentation (1) work for every problem expressed in QUBO ?
I feel yes, but how to chose the initial parameters ? I don’t see how to link the initial parameters to the problem we want to solve : do we have to choose the parameters so the initial distribution is near the solution ? This would imply having an idea of the initial distribution 
Secondly, why don’t you adapt the method described here Variational Quantum Eigensolver — perceval 0.10.2 documentation for solving the shortest path problem ?
Finally, still considering this : (1) I don’t understand how to choose the optimal configuration : in this specific case, we can see why the others don’t match : but in general, I don’t know how we could distinguish the other configurations, especially if the system return two different states in high majority in two different configurations.
Thank you in advance