Just played 2h of Ranked, my observations:
The servers and performance are horrible, be prepared to get kicked out of matches (auto-loss) and for the same to happen to your opponent, peak Konami
Opponent's turns take regularly upwards of 5 minutes real time
You will encounter 2 types of enemies: Just started with a fresh deck, mostly old cards and players who bought a complete deck, those are unbeatable unless you do the same
It is impossible to quickly pick up on this game unless you played regularly in the last few years, if you didn't follow the game after XYZ-summons be prepared to re-learn all of it EDIT: I copied the deck from the other thread and quickly picked up on it.
Card texts are walls of text for all cards now, be prepared to read a lot, if this isn't your cup of tea skip this game