If you sit through the entire rotation, there should be enough maps to satisfy your diverse needs. If you can be more specific in what you mean by guidelines other than size I'll take a closer look.
Like I said we'll be refining our rotation as the week continues.
Sure, currently the
Official servers tend to sport more open field and sprawled out village maps. These are good in their own right and serve their purpose to prepare people for Strat battles. But they also tend to favor cavalry and are typically more useful for large population battles as they are very wide spread and do not offer many choke points.
You could position the
Community servers with a more fast paced, foot-classes and close quarter combat map selection in mind. The smaller number of players would be beneficial for this and a ton of the ATS maps are great for it. Also some fun maps, which would never make it on the official ones (de_rats from CS comes to mind) would be a great change of pace.
Mind you, I am not saying unbalanced maps (e.g. completely hindering cav from playing) should be on the server per se, but as long as the map rotation balances itself out with maps benefiting one class over another from time to time on a map and reversing it on the next map, advanced players might welcome the challenge. Not every map has to be perfectly balanced in itself imo.
I am a cav player myself and am frankly bored of running around on open plains, lancing and bumping people to death out in the open where they do not stand much of a chance. I'd welcome the challenge.
What would be great is if every server has its own USP and therefore people can play what fits their playstyle best - or look for additional challenges by doing the opposite. In the end it is about providing additional fun and diversity and I am grateful for that.