I've also been playing WoT lately. I've mostly focused on the US tanks. My highest tanks thus far are a maxed out T20 and a still mostly stock T29. I haven't really found too many bugs per say. Mostly some flaws in the mechanics that can be annoying (invisible tanks that can see and hit you but you can't see them). I play the NA servers and just recently joined clan DOOM and have been in a few clan battles. Of course I feel useless in those battles because I'm not a maxed out top tier tank like most of our opponents.