I don't buy the superstate argument, since the EC consistently avoids or waters down attempts towards federalisation (full fiscal union, directly elected Commission, Parliament with legislative initiative, yada yada). Making a superstate would constrain the Commission, not empower it. The current ambiguity of having enough integration to override member states, but not enough to be democratically challenged and kept in check is the sweet spot for unaccountable technocratic capture.

Don't get me wrong, I'm completely against the EC, but I wish they were actually trying to create a superstate

Because the commission is proposed by the national governments through the European council.

Meaning any attempt at making the commission directly elected reduces the national governments powers.

What you see isn’t the commission watering down the proposals, what you see is the natural tug of war between the national governments and the European Parliament.