It's just such a goofy choice though, the whole thing that made the animatronics scary was their cold dead stare and now having them have bright red tomato eyes is such a trope and they just look way less scary than before. This - Vs this-
I suppose the red eyes is so those, who aren’t familiar with the franchise, can understand that the things they are doing isn’t normal
Ah yes because your average viewer cannot piece together that the animatronics going on a mission to kill a security guard is slightly paranormal behaviour... I guess they have to be luminescent with the stereotypical colour of danger for the entire film, ruining the atmosphere, so the normies can understand it