Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
In fact, the reason that battlecraft maps are smaller than ed42 maps (correct me if I'm wrong here) is down to the file type of the textures. BC saves as dxt3 and ED42 saves as dxt5. The tile effect has nothing to do with it. I say that because I have made maps in ED42 before then changed and saved in BC and the file size shrunk dramatically (with no loss to actual texture detail.) BC is more friendly for noobs which is why it has those settings to keep file sizes down. ED42 is good for Pro's (lol) who can take care of the compression and optimising in the final stages.