I just returned to the game after a long absence. My achievement list is almost empty despite having 5 lvl 50s when I quit. So the part where you get decoration unlocks based on achievements is not good news to me.
Well achievements came later. We all had to do a lot of things again to gain a lot of these achievements. Not our fault that you were away for a long time and decided to come back just now. You gotta put in the work just like everybody else. It's strange you seem to have an issue with that.