i get the idea of you needing to rush through but 8 seconds delay and 3 for robogrunts of delay is way too overwhelming for 2 players, if it were say at least 30 and 10-20? seconds I could see it being at least more fair because you'll have more room to figure out you probably have to use the elevator and maybe even not die from it if youre smart about it, thats only the first area
by the time me and my teammate reach a second area we kinda get a jist that some enemy types respawn, mostly assasins and robos, so we just trying to ignore them
the final area could also have the delay lowered, fightihg against 4 250 HP robogrunts with only 2 players with the spawn delay of 3 seconds is not worth it so we just waited until the hacking was done and rush down the boss and ignore the robos (i did look and you can apparently kill the robos as well cuz at least the spawn turns off after hacking…) revisions and improvements can be made