It'll make kickoffs relevant again with fewer injuries as a result, so it's a win from that perspective. And you can still onside kick in the waning moments of a game. Only downside is you can't have any Pat McAfee surprise onside kicks. I think it's a good rule change, but I'm wondering if it'll result in too many TD returns. Which is probably why it's a 1 year experiment.
I'm also interested to see what becomes of the hip drop tackle. I'm doubting you see many flags because it'll be hard to enforce in real time - football reffing is already really difficult. I don't think I could recognize 1 in real time. But what you will see is a bunch of fines resulting from such tackles. Rugby banned it, so probably a good change once defensive players learn what they can't do.