I played it for 15 years, my father was a rugby coach and he threw me on the field at the age of 7, best decision he ever made for me, lots of fun and friends over those years.
Anyway, I agree with the practice problem that NFL teams face nowadays but with 10' of tackling drills on every TC practice it would be enough, heck if you watch the video, there's zero contact on some drills so they could coach it on early OTAs if they wanted to.
Like better props for practice, better playing field for the players, if I'm an owner I would explore every option at hand if it prevents my players (assets) from injuries. (as long as it is legal)