One issue I've found using this so far is that it's difficult to know exactly who is closest to the center of the screen without a crosshair

Now I'm wondering if it would be better to workout the player closest to the center client side and have a command sent to the server to spectate a specific player instead, that way there wouldn't be any issues with prediction and you could also use this for binds to spectate specific players without looking at them

I can test this out later today. I do have a suggestion, though not sure how much of a lift it is on your end. Would it be better to draw a camera icon or the players name above their head when they are the one closest to the clients screen center?