I don’t think it’s much more complicated, they just tweaked it a little. I think the underlying system is still very simple

There have certainly been huge changes regarding the handling of political topics. Such topics used to be an anathema in general, and then three years ago, there were four posts about the Palestine conflict on the front page for many hours in a single week, and IIRC, the mods even explicitly stated that this represented an “experiment” of sorts.