I disagree with this, it depends on your playstyle. Obviously if you don't build cottages organized will always be better. However, as long as you work cottages, financial will always be a better trait, early game, late game, peacetime, wartime. It can be difficuly sometimes during war to do work cottages though, if you rely on whipping or drafting or lack good production cities, in which case organized can be better for the duration of such a war.
Bureacracy is in fact enhanced alot by financial and hardly something to avoid because of the high maintenance as your post seems to hint at.
But I'm not sure I understand your notion of a specialist economy. To me specialist economy is essentially an economy that relies on specialists throughout the empire, lots of food and hammers, and switch between production and research and most often accompanied by strategic bulbing and warfare. Obviously financial wont help you very much in this kind of game but I think it's inaccurate to say that financial is not a strong late game trait, a financial CE is the strongest economy you can have late game.