I'm okay with the new look, but I do think the SNES version is a bit better. To me it comes off as two different art styles slightly-yet-noticeably clashing with one another. And so, the new sprites would be fine if the backgrounds carried the same "cleaner" art style. But they don't. So it'd be best (for me at least) to have kept the old sprites, or given both the sprites and their backgrounds this newer style.
It's kinda like the difference between the original Megaman X and its iOS port.