I have advocated for looking at axial vibration from the thrust probes for a long time. This can be valuable information that is often ignored.
The big issue is that (some) manufacturers do not provide a surface with low runout. One compressor vendor can't get the runout as low as we did at GE on Frame 9F turbines (on the steam turbines it was lower), which are far larger - tremendously larger.
When I get crazy units, like mil pp, on axial, I inquire if I can. I am trying not to be too cynical as I get more mature, but I have often found sloppy data and data from untrained and inexperienced people, which is enough to make one jaded. Fortunately, there are many who give it their best and try to get better - not all by far.
Some learn from their mistakes; others repeat the same mistakes. Those who learn from their and other's mistakes, gain much.