Liberty may not be the better tree, but it makes the game so much more fun to play wide. I have wars constantly in my games. If you build 4 cities early game, war is very likely to come to you. 5 cities, and it's going to happen in the next couple of turns, probably from 2 civs. Playing on emperor, large +4 additional civs. This is much more fun than Deity - Tradition - Consulates - Rationalism every game.
sorry for changing subject on shrines > monuments, but that topic really only makes sense when you go tradition.