Hey jacko, since you might have been afk on IRC for a long time I'll post here my feedback on one of the maps in Siege rotation.
It's actually not a C map, it's most specifically the Forest Assault map, which is very unbalanced now without ladders. It's very easy for defense to keep the only 2 entrances very well blocked and guarded all the time.
Perhaps an extra ladder on the left wall would be a good addition (with some additional small tweaks to safeguard defense).
Tell me what you think about it, I'll pm Cohen regarding it since he's the map creator.