yes, i try to keep the tech/civics at a 1/1.33 ratio. I didn't focus on feudalism too hard. I did what i could to get to political theory fast though.
In the past feudalism would be my key tech where the whole game changes, and i would usually built only like 2 workers before feudalism. But now with the improved lumber mills and the governors, construction is my new key tech. Cant get feudalism nearly as fast as construction anyways, so now i just go for construction asap and do a lot of work with 4 action workers. Feudalism is of course still a strong thing, but since i build a lot of workers before it anyways, there is much less pressure to get there and i feel ok going for theology and recorded history first . (I think this is a great improvement in game design, much more balanced like this)
I don't find maintenance to be an issue because even while i do want to get the diplomacy victory, i don't mind selling it early game when some AI's are paying 1gpt or more for 1 favor. (and i now focus much more on getting as many suz as i can early on). This feels like another flawed design to me, to make sure i won't be behind too much on favor later on, i am buying it from civs that value it low (something like 8-10g) while selling it to civs that value it highly. (~1gpt) Ending up with lots of gold and still have more favor than any other civ in game. This whole favor thing is part of why i choose to go for every VC in a single game, if you don't limit yourself in the selling of favor at all and focus only on one non-diplomacy VC, it is too much like a cheat and gold is like water.