Combat Simulator
The whole point of these re-occuring events is that they are temporary.
Compare it with an amusement park. If the ride is always available to you, after going for a couple runs it’s not that appealing anymore. Where if it’s open for a short time every month you’d like to go there every month.
And, to me, it seemed that S1 was a lot of us testing rides. See which ones we liked. And the ones we didn’t like got removed. Even though some of the popular rides also got removed here, which is sad.
I don’t think things such as the gauntlet or SAB would be suitable for a permanent addition to the game.
I do agree there needs to be more suitable content added that’s always accesible.
Well, didn’t the Aetherblade Retreat get reworked into a Fractal, along with the Molten Facility? I skipped both of them the first time around, and I’m not really into Fractals, so I don’t know how different they are, but I seem to remember that being the “permanent version” of those things.
Then, Queen’s Gauntlet is coming back tomorrow, so it may be that it, like SAB, is a sorta-seasonal attraction. You could make an argument for these things being accessible all year long, but, there’s an argument to be made for them coming and going, too. There’s a reason the circus comes to town and then leaves.
There are still some instances, like the Canach fight, Scarlet’s Playhouse, the Tower of Nightmares instance, and Scarlet’s finale that are gone and probably won’t be back. While I’d like to see them return somehow, because they were generally enjoyable, I’m not sure how much dev time / effort I want to see put into such a thing.
Since the OP mentioned rewards, I think they’d be better as historical things without much reward, if any, for beating them in historical mode.