There is a lot to be learned from that edit regardless of "style" or anything else you might have made up to justify ignoring everything in it. Major things you should notice about it:
1 - CONTRAST. Sharpm's edit has some. Contrast is good! Especially if you want to shade that fire properly.
2 - Floor detail. Sharpm has added a little bit of extra floor detail here and there, and it does wonders to make the scene more interesting. Do you have to add the same details he did? No. But you definitely need something down there! It will help it look like an actual surface, rather than a color field.
3 - Logical pillar detail. Notice any random lines added for "noise" in sharpm's edit? No? Me neither. That's because his details are cracks and chips in the stone, not just scribbled little bits.
Some other nice touches that might not deserve a bullet or number are the way he intentionally darkened the background to help the flame stand out more, and actually read as "fire". It gave him the opportunity to work some nice highlights into the rear wall AND pillars, giving yet more depth, volume and surface information.
Reject the actual edit, reject the style, but for the love of god don't throw away good advice that someone spent their valuable time preparing!!