if that's Your thing, the Bauhaus Museum in Weimar has been recently renovated (opened about 2y ago). Not sure how it compares to the one in Berlin, but I found it to be quite well done (specially the last floor, where they allow themselves to experiment a bit). It stands in contrast to the monstrous nazi gathering space that's just across the street. Also, the campus at Dessau is constantly being renovated as well (though not sure how COVID impacted this one, since it's kinda spread around several smaller buildings).