Now, i know a lot of people want free roam, and who knows, we may possibly get it. But, an idea i had, considering more than a couple of us think we might see those temporary costumes, what if we actually used them?

If there are animatronics there, imagine having to time the position of them just right, so you could dart to another room to keep watch on a different part of the Pizzeria? You'd have to know which animatronics are fooled, and which aren't, and several other factors, while the increased difficulty of the nights getting pumped up.

You may possibly have to use different costumes that react with the animatronics differently to get through to certain areas. and who knows, we might see a return of the systems mechanic and actually have to get to certain rooms, running between them FNaF 4 style, to reactivate certain ones.

So to imagine this: You're in the office, and there's two vents that the animatronics can close in alternate rooms to cut off air, one vent closed isn't a problem, but both closed, and you'll start to black out/hallucinate, so you have to regularly run to these rooms, and potentially use the information on the camera's you remember in the office, to judge how you go about defending yourself before returning to the office.

A little proof of Concept: http://i.imgur.com/XlmgTAH.png