I would love a version that just has higher quality pixel art. I think the best part of the game is it being 2D and it will loose a lot of its charm switching to 3D
I love Diablo as a series, but honestly I don't think it is worth $70 if it's $45 to 50 or less I would recommend picking it up and I spent $100 on the ultimate edition. I am enjoying it myself, but I love arpgs and hack and slash games