I agree to a certain extent. The point shouldn't be to keep ministers the same way they were in HoI 3, but add more of them, rather, to improve on that aspect of the game and make the political system more integral.
More doesn't necessarily mean more integral though. If they are (as is widely suspected) giving the political system a good do-over, it might be more sensible from a design (and bug-fixing/balancing) perspective to keep the design relatively tight and minimalist at first, then expand through DLC later as they've got more time to focus on individual systems at a time. Politics is incredibly complex, and modelling just one system well takes an insane amount of work. A simplified model of 'political capital' allowing you to do set 'political things' like giving key people positions (appointing ministers/passing laws/what-have-you) keeps the set-up simple and expandable, while providing a historically appropriate political model without requiring the need to go into institutional differences between (for example) a US democracy, Westminister democracy, German fascism, Japanese Imperial Government and so on.