Remember that the Pros had one single practice session that morning, then had to go to the event that evening and basically play and record. You're looking at their second or third games EVER, in some cases. Using PV with the kind of situational awareness those guys, and honestly, even half-assed players like me have, is a waste of another potential ability, IMO. However, it follows the pattern we see in testing, which is that initially, it's the easiest to "master" since it's incredibly obvious how it works. If they follow the pattern the way it's expressed in testing, they will VERY quickly move on to use different abilities.
As you rightly point out, almost all of the information PV is giving them is replicated in their motion tracker and for obvious reasons, Hologram "fools" PV.