Peco recommend removal of the wires connecting the point blades to the frog, when the frog polarity is controlled by a switch, as in a Tortoise motor application, which I have always done. But why is this necessary? I have just watched a YouTube presentation showing this done, followed by making new soldered connections to the outside rails, which negates the need to sever the existing connections in the first place, surely.
The only reason I can think of for removing the existing links, is to avoid any possible shorting between the (idle) switch blade and the adjacent running rail. But that risk remains when the extra wiring is added. So what’s the point? (Sorry about the pun). I have never encountered shorting in this case.