I don't have the game yet, therefore haven't played it as well... But because of all the delays and such I just lost interest in the game altogether
What was bad with the beta? Was it the mandatory use of the "Dash attack" in order to beat the bosses while they're stunned? I've read something about it in a review. Despite Mega Man- and Roll-clones, and the concept of beating 8 bosses in order to get their abilities... I wasn't interested in the game from the beginning.