Maybe it is a little disappointing at first, but it's comforting. At least that way he won't accidentally shoot himself somehow, yes.

If we go by the script. Ianto's thinking fast on his feet as John speaks. The memory seemed to be progressing on much the same as it had been without John's input before. Holland speaking to him whether or not John responded to what he had to say or not. He wonders whether it makes that much of a difference whether they follow the script or not, or whether the script will continue on despite them.

"Maybe we should stick to what we know," he says, glancing around uncertainly before back at John. "What you know. Then at least we'll find ourselves at something of an advantage. ...hopefully.”