I'm far from an expert on tackling technique, so I'm not going to cheer or boo this change specifically. But for some context, I've heard they're trying to ban this in rugby leagues as well, and if those guys are against it, I have a hard time claiming it's in any way related to "toughness". I know that's the go to reaction to any rule like this, but if there's going to be an issue with this rule, it's going to be because it's hard to define and enforce, not that it's some move towards not "real" football.