Yes, the game is more heavy biased towards using the spin attack (right click), this is especially so when the spin speed is near max as it spins very quickly.
I do agree that some rebalancing is in order, cheaper left click and maybe no spin cost at all on the right click.
But regardless, it really helps to get opinions from people who haven't been playing it from start to finish to get a feel for things that may have been missed or overlooked. For example, I really need to make that shackle hit box bigger.
I'm also thinking that maybe an optional 'auto-aim' mode that always deflects in the direction of the boss could go a long way.
Anyway thanks for the detailed feedback.