We support both v6 and v7, you can play whichever you like.As for bugs and imbalances, we are not the map creators, d1stats.ru are.Hope that clears up your questions.
Many dota versions and custom games can be hosted in our bots.Bug/Map support is up to the map creators (dracolich/d1.stats) and obviously they only support/update the latest version. Thus psr is returned to the latest version.
From this point of view your wantoness wastes our time. Be professional and keep calm .