Yes, Serbia is also often active in this band. I have not heard Russian music stations so far, but above 1.7 MHz quite often babble between their own, only in Russian. They don't use HAM call signs, but nicknames like pike, birch, strong, boss. Their next band is 2.9-3.2MHz. They use AM in both bands and LSB on 2.9. The quality of modulation and tuning to a common channel are terrible.
On the evening of 29/30 Dec, MW was very active and exceptionally good propagation for Europe, but I didn't make notes or entries on HFU.