Hi PENKO,
One could do better with the Y-electric pump and APU running the Blue...
I agree. It would only take a couple of extra lines in the QRH.
If neither engine relights but APU geny is on line, the windmilling driven hydraulic pumps only cause ECAM to display that nugget of information when speed is below GD and when your work load is highest. It is often missed by crews because ECAM becomes a distraction reminding them of STATUS again etc.