There are some flaws with sallies. It can be a challenge without the timer because the AI will sometimes sally...but not leave the walls. So then I have to batter my way in somewhere and beat them to avoid the loss. Although that aspect seems a bit backwards, at least if forces the human to keep an honest siege going rather than just a small defensive force. So it seems a bit whacky on the battlefield, but it has reasonable strategic implications that I can accept.

Haven't seen the multi-sally though.