Back in the Arctic, South America and Australia DLCs we used to get new zoopedia frames, awnings, shop fronts, doors and windows. Then something changed and some of the DLCs only had one of this kind of pieces, like the North African door or the European shutter, and many of the new DLCs didn't have any. While I understand that some players are great builders and they can make custom windows, frames and so on, I think the new building sets from the new DLCs should include also some of these pieces for those less skilled players. Sometimes it's nice to have a window in 1 single piece instead of using 34 pieces to make a window.