There just isn't enough dirty stuff going on in this game. It's too simple.
The biggest problem is the lack of character entrance when a character gets KO'd. The matches feel like they take forever, and there just isn't anything exciting going on. I mean, you have Yipes commentating and there was barely anything for him to go off of. Opening up a character isn't really possible with anything dirty. Players regularly get caught in the corner and can block everything, the only time they get opened up is if they make a mistake. The overheads are so obvious, and that's pretty much the only thing to open people up in the corner. The characters are all pretty much slight variations of each other.
Is it the Dragonball property? Or is it explained by the timeslot + growth in viewer numbers as EVO gets bigger?