It is less so with each passing year.
One-equal-vote-per-state-regardless-of-its-size-or-population-policy that you suggested might make a greater mess than the current situation has, with tiny city-states having as much power and influence as the big ones.
Similar arguments could be made by Californians about Vermont, with a population not much larger than Long Beach, having 2 Senators.
Anyway, Europe has always been its own worst enemy, so I dont know if history is going to come back full circle now. Isnt it around when this time, last century, WW-I was in the plans?
On the German side, yes.
How much real power does the European equivalent of a Congressman have over the European equivalent of a Senator?
Is the post of the Council members, as I am assuming, largely ceremonial?