The issue with this is that it's really easy to cheese out cheap dqs for the sake of QAH points simply by suggesting optional tags, doing nitpick-tier modding, or NC recet modding. And often times the mapper doesn't know better than to request a dq instead of denying the points that actually barely affects the map in any way.
A BN's job is to nominate maps and that should be their activity resource. QAH was never meant to be a BN task hence why barely anyone gives a shit about it, and the ones who genuinely care will do it anyway regardless of activity, and most of the time they don't even need the extra activity.
It can be considered during an evaluation in some form, but it shouldn't have a fixed score that allows people to reach the minimum activity required, because again, a BN's main job is to nominate maps.
Edit: just wanna say that it's confirmed that DQs count for activity in some form, not as a fixed ratio tho which is the correct approach, QAH should be like this. I think this should solve your concerns of DQs/potentially QAH being fully obselete as activity indicators.