I'll leave out Aragon, the only thing I meant was when we look in the tactics screen, we see a 5+ row. With my extremely limited experience with the no tactics server, I'll refrain from commenting about it.
With the heroes in the list, they are basically blocking the fourth row and having the heroes in there limits the different army formations we can come up with. Having more options for players can only be a good thing and the heroes are only reducing the amount of options we have.
It's not a huge thing to change, simply remove the heroes from the army formations and place them in the fifth row by default. With this change, the heroes would always be in the back of the army, no matter what the formation is and it would give us more options to play with different formations.