What new concepts / idea changes will there be in HoI4?

[Baltasar]

I'd love to have an espionage with some impact on the game. Currently, this is barely the case.
A chance to do things differently regarding techs etc...

 

[Beagá]

Suggestions?

I think HOI 3 has enough stuff already, it´s more about polishing what it brought than creating new stuff. Things like dissent and National Unity that have somewhat confusing roles, for example. There isn´t much of a consensus of what NU actually is and if it should give bonuses/maluses if too low/high.

 

[civlibprof]

Factories
Supply depots
user altering supply lines
Unit customization

 

[BarrosRodrigues]

I'd love to have an espionage with some impact on the game. Currently, this is barely the case.
A chance to do things differently regarding techs etc...

I beg to differ because espionage is extremely OP in HOI3 TFH especially against the AI.