I think it is important to support ore dictionary
Let's say that i want people to break logs after they have obtain some tools, then I need to add all wood in minecraft. It would be cool to use ore:logwood as replacement

Progression in 1.8.9 instead of selecting individual items for anything uses a filter based system. So you'd be able to do such a thing. Even for rewards ^^. Where there it would give a random item that fits in the filter, so if you filtered it to logwood it would give any random log. Of course can select a precise item still if you desire ^^.