,
what is the point of a system where multiple parties can participate if only 1 team gets the rewards? There is no point, that is the problem. And yes if they made world NMs that were actually difficult enough or scaled in some fashion to the amount of people fighting it, then it would serve a purpose, in creating new and interesting content that many people could participate in, in the open world.
Go look at guild wars dynamic event fights, everyone who participates to a certain level can get rewards, it takes place in the open world, and the reason people work together is because they need to, in order to win. Its not just a zerg fest, because they dont design the fights to be that way, it has multiple levels and multiple strategies.
Im not saying they have to go this way, but there is no advantage to this system of having multiple parties participate, if there is no bonus for participating, in fact, the system as they describe it, the only advantage you get is if the other party dies, so what type of world do you think thats going to create?
at best people will sit around hoping you die, in which case, why have them be able to participate at all.
basically you have to either incentivize or deincentivize behavior if you want people to do something, the incentive is currently on the other party failing. In that case, why give people the option to partcipate at all
as far as having people take all your loot, they shouldnt design the system in a way that has you competing for the same loot pool. Or, the fights drops should scale up with the player involvement, as well as the difficulty, or number of mobs.
Now that monsters can link or summon, the monsters could summon other NM, or could upgrade themselves.
behemoth becomes mega behemoth if 16 people participate for example, and drops 2x as many behe drops and some special drops if he is defeated.
It could be interesting, but only if its not half assed, the problem with this system is if it doesnt incentivize multiple participants succeeding together its a total waste of time, and as it is it incentizes other parties failures, bad idea.