R55Max, well, maybe it's just my opinion, but I think that any buildings generated randomly already make the game heavily dependent on luck. In my opinion, Fortress will only amplify this effect. Tell me later how it will work exactly: will you only be able to upgrade troops that you built yourself, and only of the type available in the castle? Well, that sounds pretty cool - you run around, collect Wyverns, then build a Wyvern lair in your second castle, upgrade them, and then upgrade them again in the Hill castle. I think it won't be about the pace, but about luck. That's just my opinion.