A blacksmith covenant sounds interesting. I always wished there were more ways to get chunks and slabs other than (rare) treasure and farming. I like the idea of a covenant only Ember.

But to be honest, I hope they give the weapon upgrade system a twist altogether and add some more depth other than 'collect shards/chunks/slabs and go from +1 to +5'. Even though Dark Souls' system is already way more functional than Demon's Souls was, I still feel not all weapon types are relevant (Occult and Raw for example).