I agree that there should be more minions, I can't make those changes for you, I can only support your opinion. 

Also another idea would be to add more animals to the game, maybe horses, then you would buy the upgrade to be able to tame them, it would cause faster travel, and more storage also upgrading your horses storage with gold. (Make it so horses can't be killed) You can also make it so that the horses can be raided!