Thank you for this very helpful post

Also, the Act 1 of v1.0 will be somewhat different from that of the EA version[...]
A good think to keep in mind. Especially for those who feel like some paths/quests are not fleshed out enough.
Is it worth getting into BG3 now ?
If you want a smooth experience : no, the current version is far from polished and still full of bugs. If you just want to experience the story and don't mind the lack of polish : no, see previous question.
I'm just going to note that it's still possible to enjoy an incomplete story. I mean...I did just that for 500+ hours of play time.
But it is indeed important to keep in mind that the story is incomplete and the game still need polishing.