If the game gains enough interest, and we are ready to start the mission, there is something that players need to decide. It is the way the game is played from GM's perspective. There are two ways, each with its pros and cons. 

[b]1. Playthrough with essential NPC[/b]
GM controls a character that serves as the designated team leader. They have their own background, motives, and interests. Generally, They give your character orders, and although it is not mandatory, your character answers to them. 

Pros:
-More focused campaign 
-Reliable pointer, easier campaign
-The first person to blame if something goes wrong
-A powerful ally

Cons:
-The game would feel railroaded
-Additional boss

[b]2. Playthrough without essential NPC[/b]
The GM only acts as dungeon master handing out clues and pointers. However to keep the game progression remain focused on the mission, players should elect one player to be a team leader. This team leader would be the one holding the communication device and deciding how they conduct their investigation. 

Pros
-Grants more Freedom
-Free of conflict of interest from the GM
-Freedom
-Team leader get some privilege 
-Likely more natural interaction 

Cons
-When things go south, it is your fault
-Team Leader character needs a relevant background and more tailoring
-More hassle


So, which one do you choose?