Mentsl overload is definitely a thing when you come back to playing this after a short break. But nothing says you have to take part in the new mechanics in a map. You can just run the map and kill the boss and be done with it. Although I guess if you have not played since they revamped the atlas that would be a thing.
I had some weirdness going on this morning for me. I tried doing a couple of delves and it was very they didn’t work at all… I was going down the main path, vertical one in the center of the screen. I went to the next spot, but no mobs spawned and there was no interaction available when the cart came to a stop. So it’s just sitting there and I can’t go any further and nothings happened. Had to relog to get out. I tried it twice and the same thing happened both times. I then tried a side path and everything seemed OK. So I’m not sure if it’s a momentary glitch or what.