Strongly agree with what you're saying. I think they've brought out a good game with a solid foundation for turning it into a great game with tweaks and expansions. I've put 26 hours into it since Tuesday and I'm loving it, so they've definitely done something right.

Agree with the tech tree, it's too short and you likely won't vary in the techs you get if you're playing a country with reasonable research points. I'd love some more country-specific flavour and actions; I understand folks don't want to be railroaded (having options to play a country any way you want is great), but it feels a little empty at the moment. Of course this can be modded in and filled out with DLC down the road.

If you enjoy this era of history or enjoy other Paradox games, I'd strongly recommend giving it a go.