I couldn't find a clear definition for superstate, so I retract.

My point is most institutions are bottom up not top down.

• the EU can't start a war or stop a member starting one ( like UK vs Iraq)
• the EU can't stop windy city boys causing a global financial crisis
• Europol can't arrest a London lawyer engaged in tax evasion schemes on British territory like Guernsey
• the ECB is controlled by a council of representative of national central banks.

Contrary to this

• Washington is able to stop Texas invading Mexico,
• the FBI can arrest criminal bankers at Wallstreet
• Dollar is not controlled by a council with representatives of a hypothetical California or Missouri central bank.

Finally the number of civil servants working for the EU is comparable to the one of the Birmingham City Council, not more.