As Sengoku was practice for some of the game concepts introduced in CKII, is March of the Eagles an introduction/test of some of the new game mechanics in EUIV? I've been scanning the developer diaries for similarities, but not much has been covered insofar as combat goes for EUIV yet. The running treasury (as opposed to the yearly direct tax) looks to be the same, but a port of the combat system described in the diaries is what intrigues me the most.