Update 1.0.1 went live yesterday, and it specifically mentions a number of AFK changes - not sure it’s enough, but at least they are aware of the issues:
AFK PREVENTION
In an effort to ensure players can’t stay AFK, especially in higher population servers, we’ve made the following adjustments to the AFK prevention system.
- Added additional AFK prevention to ensure players cannot fool the existing system with simulated mouse movement.
- Shortened the AFK warning message from 20mins to 15mins.
- Shortened the AFK disconnect from 25mins to 20mins.
Full update details here: