You simply have to treat the nest differently.
Before, you had to be on the lookout for a melee character pushing through around the corner and up the stairs to try and knock you out into the middle. Your retreat was through the hole in the nest towards the stinger turret, and then you had to loop back around towards the stairs, getting dangerously close to the heavy action where the waves are smashing against each other.
Now, you have to be on the lookout for a melee character hopping up via the box. Your retreat is the same direction, only if you prevail and manage to take them out with the help of the turret there (you… you are keeping that turret up, right?), or they just wuss out and bail thinking they’ve put a stop to your shenanigans, you don’t have to waste time or risk getting swept up in wave clear while running back around to the stairs - they’re right in front of you.