I thought of a couple solution to Blizz bot issues.
Make all players every 12 months buy one month of game time. They did this in November and it helped a lot. You can still use the token for the other 11 months.
In the War Within make the AH be a war band function. This way people can’t bot on a second account via cancel scanning. I can be mistaken but I think I heard that a war band is your entire battlenet accounts. If you have three WoW accounts on one battlenet account they would under the same warband.
The commodities market will go back to being server specific. This will make it harder on bots to hide on dead realms and sell their wares on high pop realms.
Cancel auctions will now return to your mail after 12 hours. This will prevent cancel scanning.
There will be a gathering limit per 24 hours. It would be high enough to only impact bots.
2X4 farming will be nuke into the ground.