All the changes look very good. I don't really care that Paradox puts unrelated features into DLC, because it's been noted by many before with CK2 DLCs that the DLCs tend to be optional if players don't want to play whatever they focus on (Republics, pagans, et cetera). Gotta make money somehow. If people think this is some sort of terrible new gouging, perhaps they ought to try vanilla, no-expansions-installed EUIII and see how many quality-of-life interface enhancements they don't have. The free patches always include many features that formerly would have been part of paid expansions.
That being said, as good as this sounds, after the last several DLC (including and especially Rajas of India, but also Conquest of Paradise), I simply will not buy this DLC at launch no matter how much I like the sound of it. I have no faith that the DLC will work as advertised, that it will not have key features broken or have broken other portions of the game. I was dumb and bought RoI at launch, after buying CoP at launch (and several buggy, semi-finished DLCs before that), and I couldn't even play CK2 for over a week, along with many other players - which was merely one of many problems with it that should have been noticed before launch. There has been no explanation, apology, or roadmap on how Paradox intends to avoid this situation in the future.
I don't mean to be overly harsh. I really do like most of what you're doing here and am particularly enthusiastic about the Hinduism changes. But you cannot have releases like RoI and expect me to buy your next DLC on launch day, or indeed any day soon after. I won't lie and claim I won't get it eventually (the Hinduism changes make it a sale to me, even though a lot of other features aren't that relevant since I rarely play Europeans), but it will be after some patches and I therefore might as well wait for a sale. You will make more money out of me in the future if you fix whatever has gone wrong with your QA.