Good argument technique.
Feudalism was built on personal ties of individuals. HRE is very bad parallel.
Consider that right now we have bunch of supra-national entities we work for already, and we get services from; national economies are jokes basically no importance next to the common EU market and especially to global economy. Have EU institutions in place that can take over the role of local govenrments, common defense force in the pipes, in foreign relations now simple majority is enough, don't need unanimous decisions, etc. Now that corona and war showed the importance of banding together and the unified actions they'll push for more concentrated power.
There are voices against but from countries of no importance, like Italy, Hungary, and Poland. Without real weight, no real counterbalance can form, to change the course or even slow it down.