I want that free exploration. I want to support the Merntir as it likely increases the chances of a peaceful resolution to the issue up north. I agree with leaving them be in the south. Let our Vassals have the heroes. Personally at this point I don't think I want the vassals to be under our direct control yet. So long as they are vassals our group as a whole ends up with extra actions, since each of our vassals gets 2 actions. Course they are also way more settled than us, especially the Merntir, wouldn't be surprised if they have 3 actions at this point. As for the mega-upgrade, I definitely like both the magic technologies and the blessing upgrade. Both things could be very helpful for us.