I wholeheartedly agree 100%! The AI should have as many decks as possible.
Unfortunately, it is not all that easy to implement a new deck for the AI in YGOPro. The program was created for player vs player duels mostly, without an AI in mind, so implementing decks for the AI takes a while.
If you do not have it yet, check out the
latest experimental version , it comes with a couple of new decks, including Gladiator Beasts and Lightsworns. I am constantly working on new decks, and occasionally, some community members code their own decks as well, which I then implement into the AI. Feel free to check out the
AI scripting tutorial , if you are interested in adding decks yourself, or if you're just curious, how much work is involved in adding a new deck.