I'm planning to deprecate auc once owut is fully fit for the task. I anyway wanted to replace auc with a ucode implementation, and now @efahl was quick to implement it with even more features than expected 
It will still need some minor fixes here and there, see comments in https://github.com/openwrt/packages/pull/24324, but I expect this to be doable before the next stable release which will then no longer offer auc.