For me shared tagging falls in the same bucket as world quest boss ride-by tapping in retail. Feels cheap and makes players treat each other like unwitting assistant-bots.
I’d like to see the mob competition issues fixed, but it’d be better to treat the cause than put a band-aid on the symptom. The only reason it’s a problem in Forever is because layers are way too packed. It’d mostly be solved by “just” cutting the layer pop cap down to like 20% of what it is presently.