Many people included me has proposed that BOT,s could Dig instead of you and once sugested that, but the topic has a litle garbage so instead o making a 2.0 now.
. it will be interesting a menu where the bots can recive build orders like the ones we got while pressing the right mouse button in hammer selection menu.
a arrow should be enough to place soldiers to shovel it, in dig simple you can get 3 shovel hits, and in dig deep 8 shovel digs. it will be interesting and maybe hardcoded that the troops able to refil the holes to regain the possible advatange over the initial layout of the ground.
once it,s builded. you can place troops inside.
that,s it, cheers.