Exactly, and now I believe it's time to add the mouse to aim all around. I really truly believe it will be overall better. It works for the side scrolling game because it is a side-scroller. This game is no longer a side-scroller.
I still don't agree with you. Mouse aiming is great for shooter games but I have my doubts about using it with hack and slash. As an example, you have the amazing Crawl, which uses the same principle of horizontal interactions but with vastly superior gameplay than DvsD. I grant you the hit boxes in the original version of DvsD have been rearranged to make it easy to hit monsters even vertically. So please give the latest versions a try.
As always! Thanks for the comment.