Secondary heroes valueless in Might & Magic Heroes VI game .

Secondary heroes are useless?
After playing the game for some days it's intensely irritated me that you can't join multiple Heroes into an army.
Extra Heroes seem to be very unsatisfactory with their incomplete capabilities. Are there any actual uses for them apart from:
*gathering slight matter around the map.
* Gaining a little extra abilities spend in income/production.
*Buying component and transfer them to your First Hero.
Rather else though. The game quit much seems to just be all about one Hero and a little lackeys here and there right in the background almost unremarkable?

By this reply you had exposed that you not at all played Heroes. On various campaign missions I challenge it will be impracticable to win without them. In multiplayer on big maps they are going to be precious as well.

I confess I'm quite new and maybe rather naive. But I've simply been capable to play a incomplete amount of campaign levels payable to beta.
Could you explain thou please how they are invaluable and priceless? It would help out me get better at least.

On big maps it's extremely significant to have 2 or even extra heroes unless you to play a round for ages. You require many heroes to have managed over map, or the opponent will keep retrieving castles from you.
I'm not confident how the town adaptation will look like in the last version. But in Heroes III on big maps in late phase when you had more than one type of faction it was main to have other heroes to manage it. It's constantly better to have hero in garrison while opponent attacks your castle.

With fresh features like global recruitment and town portal you officially can get away with having one hero, but in the extra heroes games you wanted tons of heroes.