If you enter a new instace where you're alone, it's reasonable to assume that the dread enemies would spawn and fill up the map just like all other enemies do. Sadly, some dumbass decided that they won't and you need to wait for their entire respawn timer. I've explored an entire region and found all things i'm looking for in there while waiting for one to respawn and i still need to stand around for minutes after that. It doesn't matter how long it actually takes, it's just idiotic to have to stand around doing nothing. "Kill random enemies" you might say, but since they have nothing i need, why would i?
I know, and this was another point that is making NGS suck. This game is rapidly becoming a 2nd job, Sega is forcing you to be online at very specific times so you can do your daily quests or events, there is no global set timer for the respawns, so if you log in and want to kill a dread monster you could be waiting 5 minutes or well over an hour literally doing nothing but wait, this is not a good design.
We need either private instances, or a mission counter where we can spawn our own missions like in PSo2 - I have things to do so I'm not going to wait around for storms or respawns for mobs, Sega please stop this asinine practice as it does not help NGS at all, it is counter-productive.