the sneaky “lost Ross” is often a renovation that masquerades as a restoration but just uses the same rolled down faces as every other restoration. Often these bunkers don’t match what the course originally looked like. It’s like designers just stared at that picture of Salem Country Club for an hour and decided “that’s what a Ross looks like!”
This is accurate but you're really describing a construction problem, as much as an architecture problem.
In theory every architect could present the same master plan for a restoration -- what was actually built. What you've described is the execution of the shaping, and the success of any restoration is all about that.
Many architects rely on contractors, and many clubs choose contractors who have past experience restoring a course by Donald Ross, and you can see where that tends to lead. That doesn't absolve the architect for supervising C+ detail work, but if everyone else involved is more concerned about staying on schedule [which for the contractor equals making more profit], C+ shaping is what you're going to get.
And honestly, even the A-level shapers tend to build things that look like their own work, as much as they look like any particular architect's, unless they are very conscientious and feel that a particular course needs something different.