This is actually a bug and was not intentional!
I didn’t have time to get it in for this patch, but it is fixed in the next one. Sorry about that!
As to your question about specific details, here is some info:
We have work to do on both the strategic layer and the tactical layer. In a game like Heroes, these two things are very connected as well, which complicates things, as you might imagine.
Strategy wise, your example of defending the core (and assaulting an enemy core) properly is hi...