Strange I never had any problems hosting 4v4 games on MTW, a big congrats to Creative Assembly though for continueing to lower the standard of thier multiplayer skills with each Total War game in the series.
With MTW they managed to import all the old bugs from Shogun over and this time they have created a huge array of gems to add to Shoguns first release bugs and thats not mentioning the things they kindly left out.

Sp00n