First of all, I'd like to point out that I was very happy about the merge, seeing as the online playerbase increased exponentially.
However there are a few things that could be implemented that could help greatly.
Most importantly, I feel and know it isn't too hard to implement, but an in-game auto-translator should be included, most Russians I have met since the merge either don't understand or refuse to communicate in English. And when one tries, it is not understandable for the most time.
Secondly from the couple solo queue experiences I've had I can see that the Russian player base is very young in terms of MOBA knowledge and somewhat immature as well.
Especially in the last game I had this morning, I had a 4 man pre-made Russian team, they didn't communicate at all in lobby, then went with 4 people into 1 lane, pushed 1 turret, then proceeded to go 0-15 in about 9 min, one afk'd the rest kept dying, whilst i farmed one lane on my peaceful island not giving a care in the world, then bang on 15 min mark instant 15 min surrender.
Hence if games are gonna be like this I would suggest that the surrender function be moved to the 20 min mark at least or the MMR changes need fixing...fast :|
Nevertheless There will always be young players in the game, and teaching them is something I don't mind, however I don't speak Russian, so the chat auto-translator would be a bomb