Just use the camera to move close to the player(s) first before pressing F6. It's easy if you're in spec. It's more if you're using it while playing that it doesn't help as much, particularly if you're not near the incident at all. Of course, that's simply a universal problem of admins not being omniscient.
It's nice and easy to use, and it is very fast.
A spectate button would be amazing, but I realise that's a different challenge altogether. Still, loving it so far, and I can't wait to see it in an improved form!