Its very hard to find the rules since there is no rule that they are pushing into your eyes. After reading you learn about vampirism, clans and many other breathlessly.
This is not true. It's easy to find the rules, since they were in chapters like "Systems and Drama."
They didnt change the game for years until they had a problem about licence. Then they had to change the caine myth which they call vampires come from him and had to change clans other things that they have to cause of licencing.
This is also not true. The game changed dramatically over the years. Brujah were just denim jacket wearing punks in the first edition, and over time evolved into a clan of fallen philosopher warriors, whose anger had overtaken their intellect. Vicissitude went from a normal Discipline to a disease to a semi-sentient Umbral creature that infested the blood of the Tzimisce back to being a Discipline. Disciplines were changed in every edition, with Thaumaturgy (the most prolific) receiving the most changes over the years.
The combat system changed dramatically between 1st and 2nd, and again for the revised edition. They rescaled damage values, added a new damage type (bashing) and made a lot of fundamental tweaks to the potency of weapons. Social and mental systems received far more development, and in some cases were worlds apart from their previous edition counterpart. The game changed constantly, because that's what games are supposed to do: evolve.
And your claims about licensing or anything forcing them to make any changes is completely untrue. There is no licensing issue with using elements from the Bible, since it is public domain. They outlined their reasons for dropping oWoD and changing things up with nWoD, and licensing is not one of those reasons.
they dont add new vampires every day. They dont add new vampire powers every month.
This is also false, since after the core books, we were given the Sabbat, with bloodlines like Kiasyd. There were multitudes of new vampire bloodlines and Disciplines throughout the bloodline, to the point where in Revised Edition they actually cut down the number significantly. New splatbooks featured new Discipline powers, bloodlines, Abilities, Merits, and Flaws. It got to the point where people made fansites to put together an index of what powers/merits/flaws/doodads are in which book.
But you dont need to buy any.
No, but if you miss any, then you will be lost because the metaplot advanced in almost every book, so if you missed out on Guide to the Camarilla, you'd be surprised about the Gangrel leaving it, because that wasn't in the core book.
martial arts .. ???? Please tell me .. why ? Why is this book existing. Why didnt they do it before if needed ? Answer is simple for extra money.
Why didn't they do it before what? Before they released the game? Is English a second language for you? A lot of things you're saying make no sense, whether because of language or just inability to coherently express some of your opinions.