we loved it!
we've been to berlin plenty of times before, but for the past few years it was almost for clubbing purposes only. so this time we finally got the chance to do and see other stuff instead - finally did one of the bunker tours, went back to see the brandenburger tor etc, visited the neue nationalgalerie and spent a lot of time with friends who live in berlin.
pretty unexpectedly, thanks to a friend who lives there, we also ended up going to one small party. we really didn't go to berlin with lots of parties in mind, but when the opportunity arose we obviously didn't say no
but even without that it was a very enjoyable stay.
I'd go anyway if I were you. berlin's clubcommission is also trying to convince the senate to accept PCR tests for clubs to reopen their dancefloors so maybe not everything is lost for the remainder of the winter there.