I wanted to propose an issue regarding how vault doors function that can lead to sometimes 2-3 deathclaw attacks in a row.

When you decide to sent multiple dwellers out into the wasteland the current situation means that the vault door must open and close multiple times for each dweller sent out.

however when multiple dwellers return from the wasteland at the same time they will all be able to re enter the vault with only one door cycle.

This basically means that the game lacks a staging area if you will.

I propose that when you set a dweller to explore instead of immediately existing the vault they will simply line up at the vault door and wait there until the player manually opens the vault. To maintain balance if an incident breaks out the waiting dwellers will not be able to defend the vault door and simply flee to the nearest living space. this mechanic is to prevent 10 dwellers with power armor and Gatling lasers from being permanently stacked at the vault door.

But what this queuing system will provide is a way to control how often and how long a vault door remains open thus preventing excessive death-claw attacks from triggering

I should note that there is a way to avoid death-claw attacks when sending out explorers but i am fairly sure it is considered an exploit so i will not post it here (mostly because i dont want it patched )