I like TT, especially because of the rules, without them it would just be a glorified tic-tac-toe.

What I don't like is that the AI is so weak that the only way the devs managed to make it challenging is by litteraly having the npc cheat. Using decks with two 5 stars cards and three 4 stars cards while you're stuck with one 5 star and four 3 stars.
I'd rather they give a bigger deck to the npc so you can't really predict what they'll play and that they fix the AI so it doesn't just play cards randomly and hope for the best. With it we could have different lvl npc allowing different decks rules, with something like free mode where both players can use as many 5 stars cards as they want or a rule that require you to use one card of each rank.

That would give us an excuse to use cards we never use.