If you know Russian good enough, Russian servers are definitely better. They actually got a very good populated p2p server.
Population has dropped significantly, but it's still much better than here, especially with cross-server battlegrounds. The subscription server has low population

. It's down to 5 or 6 free servers, 3 of which have low population.
The economy has always been healthier there, and they're more generous with the events. And if you decide to pay, it's significantly cheaper. Also, due to the larger population, there's more variety, people are more tolerant of weak people. When I dinged 65, people were taking me to astral with 221/111 runes. The "required" runes are 5s and you'll be equal with the majority of the population, not 7s as they were here when I left.