I am only a newcomer to PBW but in two games it seems that ruins are having a particularly unbalancing effect. In one game I got Rock Col tech on turn 3 (I was Icy) giveing me a massive early boost in planets and hence research and production. In a second game I got two fighter tech levels, not neccessarily game breaking but I was Organic... Hence medium fighters with zappers (my term for electric discharge) in the 30thish turn! (I also got to the planet one move earlier than a rival empire!)
In future I think I will be looking closely at PBW game set ups and not playing if Ruins are enabled.
What do the more experienced PBW players think? Is it just luck of the draw?
J.