I don't know where you are getting that I am not reading or that no one is calling for the 24 hour nms spawns, considering you quoted someone just a few posts ago saying to add "quick spawns. long spawns. lottery spawns. Place holder spawns. timed spawns. 24 hours spawns. rare spawns." to which they also said, "if you don't like it then don't do it." And people like that is what i was generally responding to in my post. There is no middle ground, everyone seems to want free roaming nms, and the general concensus is "instances are bad because they are too repeatable." What about timed instances that are challenging. Ones that you can be repeated only every so often but with great rewards? Remember einherjahr? Even skilled linkshells had trouble getting through there, and it didnt take the ability to sit there and wait, you could log in and you were done with it in half an hour at your linkshells convenience and you either moved on to the next tier or didnt. Like lots of people have also suggested, what about poppable nms that are hard to get the pops for like kirin that you could do at your own conveniance but was still a pain in the ass to get to because you had to kill 12 other nms before you even got there. This is the middle ground.
As far as roaming nms, the best middle ground I could think of would be roaming NMS that are so damn powerful it takes 100 people to take down on like a 2 week spawn. Something that is such a massive undertaking you would need to gather a large portion of the server during a set time to take it down, something that would take time and planning would need to be at a time convenient for a large majority of the player base to undertake, and not just based on which ls could be there on time and who could claim it first. How the rewards would work, I have absolutely no idea, maybe something involving the free company system where your free company gets a tokens or some sort of currency based on how involved it was in the fight which could then be exchanged to fight a poppable nm that drops gear, or could just be traded in for gear itself. Whether this is going to be possible in 2.0 or not I have no idea.
I am sure there are other ways that there could be balance between this, but everyone needs to realize for this to be a successful game the player base needs to have challenging content with rare items, that isnt based on whether or not they can log in at a certain time dictated by an algorithm SE made, and more about the time they can log in at their convenience and take part in the challenging content.