The 8bit demakes did a good job at least as far as the boss fights are concerned, but they're missing too much stuff, and some art isn't great.
Also for 7, the change of scale is really obvious and makes some levels like Freeze Man or Shade Man stage a joke in the demake, while they're fine in the original. They changed the scale, but was the scale like that to begin with, some enemy design and placement would have been different.
Also part of what makes 7 and 8 so good is exactly their art styles.
also>not a single mention of Rockman & Forte itt
It's a great game. I love it. It has some bullshit moments but the higher difficulty is a welcome change of pace, and Bass is tons of fun to play as.