Are there badges for semi-finalist, and finalist? are will there be, and if so, there should be.

Yes there are. You will receive one immediately after one of your groups performs in a semifinals or finals event. There are also extra special badges for groups that get a bronze, silver, or gold at finals.

Aha. I see it now. I didn't know if they would be made the moment they made semis or finals or after they performed.