I don't like the +3 culture as an opener because it makes this tree so strong, policies are coming too fast compared to liberty or honor.
Klokwerk
We debated this one for a while. The general consensus was that currently the Tradition policy is the "standard" tree most people pick. That means its culture pace of picking policies is what people are used to. If we nerfed its pace....we effective slow down the culture pace of most games in general.
So the thought was to get honor and liberty's pace more in line with tradition instead of the other way around.
In the honor thread, we are currently discussing a doubling of barb kill culture and some other culture bonuses to do just that.