I've leveled a WR and had PI called. But yeah, obviously PI needs to be fixed but I think the reason we don't see it done in a patch is they'd likely have to completely re-code WR&DB interactions and, given the lack of a true physics engine, add corresponding animations.
As it is now the only time PI even "deserves" to be called is when you level a guy early or in the case where a defender gets in front of the receiver and impedes his progress to the ball, but even that's not an interaction animation.
I don't think something like that will ever be fixed in a patch, we can only hope to see it fixed for next year IMO