Haha, the reason why I didn't put Zhu Tang in is because of
"Legend of Zhu Tang:
Once upon a time, a mighty warrior appeared in Clint City. Although he weighed in at a mere 3 stars, he bore the magical Sword of the Cursed Ronin, forged in the fires of Mount Doom by twelve Mongolian 4-armed nuns. His power was an incredible 8, and if left unchecked, he could make a gap of 8 or even 12 life! The heavens did tremble at the mention of such an incredible swordsman, and all of the enemies of the Fang Pi Clang ran in fear.
However, the day came when Zhu Tang finally faced combat. It was soon appeared that the blade's magic had some very restrictive limitations... Pirates, hippies, feminists, creatures of the night, and Vryer's army of monstrosities had much less to fear from the Sword of the Cursed Ronin, as did certain members of every single clan. In the end, the truth was revealed: Zhu Tang was only a humble pig farmer. The cursed sword's song was diminished by his calloused hands. Although still a fearsome warrior, sometimes able to make up for his lack of skill with pure cunning, no one would call Zhu Tang "overpowered" ever again..."
That does by no means make Zhu Tang a bad card. He's awesome. People hate on him because as much good as he looks on paper, he can also look extremely bad on paper, as the author of that story shows. Tunnel-vision.
Sure you're not going to get the full 8-12 gap ALL the time, but there will be many instances where you will, and that kind of gap keeps your opponent in check and lets you play in control. He's almost as good as Shifou, which is saying a lot.