Nop, the game don't include ani help about game's style itself, because for know yu-gi-oh, you have a lot of things on the internet, like the official manual, video tutorials, and etc.
It is a good addition to the future add a basic tutorial for explain to the new users the mechanism on the game, but really isn't a priority for now.
About the cards. Nop, I think that you found on redit a talk about tthe ld yu-gi-o mud. This mud, have a giant database, with the majority of the cards, with more than 8000.
It is updated regularlly following updates of other ygoPro scripts and databases.
About the new format... really? new change of the rules again?
Do you have an article or some text ning this?
WWithout reading about it yet, I think that is a bad idea changing the core of the game again. So, I think that the links are tha good idea, but not with the changes of the battlefield or similarities, but wel.l i have to aread about these news.