I found this interesting: Blister tells you what year model they review and if there were any changes from previous years (aside from graphics). For the protest here's what he had:
[Note: Our review was conducted on the 12/13 Protest, which was not changed for 13/14, 14/15, 15/16, 16/17, 17/18, 18/19, or 19/20, apart from graphics.]
More typical is "no changes from last year's model" or maybe two years back.
That says something (good, I think) about the design and the company. Thanks
@Ron for putting them on the radar.