This is why I would like to see an "official" map pack released once or twice a year where the highest quality polished maps that the community want to play will be released. They would include map previews, map info and all the nessicary files needed. This would stop maps like shock which probably took 1-3 hours to make and compile being played over high quality maps that actually involve strategy like carpathian for example. This way new maps coming through will be what the community want they could vote on which maps to include.
I don't know just an idea I had in my head for a while thought it might be useful.
An improved idea of your idea;
Every server that has its unique ''old skool'' map rotation, but maps such as shock are entertaining for me and some other people since i have played them over 2-3 years, and it just reminds me old things, but i would suggest something like this:
One big map, one close map, one big map etc rotation, it would be much more entertaining