Thanks for throwing in your thoughts and I’m glad we are on the same page! I hope the Devs really will implement this.
The more I think about it, the more crucial it is. BB absolutely needs to have a definitive end game/ “final boss” in order to make it worthwhile to the player to keep playing. A really, reaaaally hard boss that will require at least 80 hours of gameplay to beat as well as well thought strategy. Otherwise it becomes a beat-down or mop-up as you put it, which I completely agree with.
Here is to “Final dungeon”!