You're right, Steemit is an amazing n rewarding platform if you put in time n effort into it.
About tagging, I would say, there should be a menu at the top that contains your posts according to the tags. Instead of having all the posts under Blog, there should be categories according to tags.
However, Steemit is still something new. It will evolve over time n keep getting better with time. Keep Steeming. It is much more than an ATM.