I know I’m probably something of an outlier here, but I liked when the twins were teased and they’d show up in the middle of your missions. I liked the Terror in the Dark event (minus the dark part) because Rinda just works so differently as a boss.
Even though all three of the bosses we have now are supposed to function differently, they all fill the same role of “big, slow, lumbering, thing you have to keep track of that isn’t really a threat”. Even fleshbags can be easily avoided if you know what you’re doing, and so most of the bosses turn into big no-no zones to avoid until you isolate them.
Rinda is different, because you can’t isolate her OR avoid her during a horde fight; she’s fast and in your face. She may be cheap to block, but one player exclusively focusing on blocking Rinda means you’re down one player, and especially if you have to bail them out because adds are focusing them too.
I think it’d be neat if she showed up sometimes in place of your usual “horrible chaos thing” boss. Minus the void shield, of course. She’s different enough that it’s fun!