1. It's hard to find someone with time for setting and playing Machines these days. Recently I've played a match with @BeVeRenT-. Try and ask him directly.
2. There are quite a lot of mods in the Modding section http://wiredforwar.org/category/4/modding. There are mods with enhanced graphics http://wiredforwar.org/topic/110/texture4/10, increasing max unit size http://wiredforwar.org/topic/17/mods-machines-loader or some custom scenarios available on the forums http://forums.wiredforwar.org/index.php?board=4.0.
   The AI intelligence is impossible to change, but you can try changing the settings in parmdata to make the AI build better, produce more units, change attack squads, improve machines speed/damage/accuracy etc. See here http://wiredforwar.org/topic/3/getting-started-with-modding-machines/2.

Good luck and have fun!