Just for clarification: by quality, I mean you already know basic stuff like where to add jump, how to make the map neat, make patterns with polygon function, etc. On top of it, the map has gone through lots of remapping, or the mapper has mapped for a while (say, at least 4-8 months). It's actually a map good enough to go for rank, and needs mods before ranking. I'm not looking to write a mapping guide--they are easily available. If you didn't understand what I just said above about polygons and jumps, this queue may not be for you.
For example, I'm modding [ Rizen ]'s map right now. He understands basic mapping, knows how to represent rhythm, and map is not a mess. It's a map in which I can actually mod--I can think about what could be done for improvement.
I don't intend to be that picky! As much as you guys want to improve your map, I want to improve my modding. And good luck if you are still learning to map.
NM still open. I'm checking this queue periodically