My thoughts overall, workers are devalued early, monarchy is devalued, code of laws somewhat devalued since courthouses are so expensive. Libraries for scientists are important.
Not sure why you say monarchy is devalued? I think CoL is indeed devalued, but it's because we can't use caste system. Every building is in a sense more expensive because we can't whip, chop, mine - I'm not too concerned about courthouses, myself. But I agree with workers being a little less important early and importance of libraries.
My thoughts are, imperialistic and organized (or creative if you're getting pyramids), and possibly industrious is the way to go for this. Imperialistic settler starts are definitely the way to get a leg up.
As I understand it, the settler production bonus is only for hammers not surplus food. Since you are likely building your settlers mostly from food resource tiles, and can't chop or whip, I would think imperialistic would give you very little. Organized and industrious both sound nice, but I think Creative would be huge for the land grab and cheap libraries/theaters. Don't know why you mention the pyramids.
Philo is always a strong trait, and financial isn't as great as usual, but water tiles are still nice. I usually like expansive, but it's pretty weak in this variant. Health isn't as much of a problem, and the granary has become pretty weak. (No whipping, and the production time negates the early benefit of quicker growth.)