besides the once a month ACM, are there other avenues of regular commuting for myself AND my family (eg. ID90s, ID50s, jumpseat hop ons, etc.)?
The ACM are only for the Pilot employee. In addition, you get 1 positive space first class rtn tkt (3-1) and 1 Stby rtn tkt (4-1) each year. Your family gets those as well.
After that, you can but ID 90 space available or ID 50 confirmed space on Saudia. That can get pricey....
Saudia also has ZED agreements with most major airlines. Zed fare can be cheaper than using the ID tickets on Saudia. The only time I ever have an issue with a ZED is while flying inside the USA as the flights are usually full and Zed is the lowest priority. I use them regularly out of Europe to the USA and Canada, then once in the states, I buy full fare on Jetblue or something similar.
Same deal for Asia, I usually make my way to KUL and then buy full fare on Air Asia. Although I have had some good luck with Zed's on Malaysian