Unfortunately I didn't see the post repair you are referring to. I am assuming that your reference to a "wedge patch" indicates that the scarf had sloped faces on the blades. This is referred to as a "splayed" scarf. The end of the blades typically ends ay an abutment cut from the blade to the face of the timber. A simple splayed scarf with square or undersquinted (undercut) abutments is commonly used in horizontal timbers such as plates or ties. Rarely have I seen it used in post bottom repairs.
A modification to this scarf joint is known as a "scissor" scarf which has two blades, each cut halfway through the timber and with opposing slopes. I have seen this scarf used in post repairs and it appears to work quite well.
Can you describe the "wedge" condition more clearly?