.... Freedom is pretty amazing... (and I suppose you've never built landmarks for someone else/ control the WC?) if picking an ideology leads to DoW then you haven't been doing diplo right. It's just that it doesn't have as much happy as the other trees but the bonuses it gives are pretty amazing, esp. for CS influence.
For people who complain the deity is too easy perhaps they should try culture or domination victories rather than boring science or diplomatic ones. And try not picking Order for once so you have to battle ideology pressure and see how well you do in making a well-rounded empire, rather than one that just has science.
Granted, if the OP wants. he can feel free to post a challenge himself. I'll be waiting...
I have not said, that freedom is not great

And it seems that the AI actually cares if they take 2 or one free tenet, as I have never had a game, where after I pick any ideology, the second to pick one takes the same as me

By taking freedom, almost all games I played, I was alone there. Its completely different story - if you take order you have always order friends.
And besides all that freedom is better than order, only when you want CV. Order is better for both science and domination ... I have 1 single diplo victory, so I have no idea about it.