As Warburton was saying on Friday night tackle technique is really not good enough generally (Williams ko was at knee height).
Yes, favourite shoulder syndrome means making tackles with the head in the wrong place.
The big question is whether senior players are actually coached in tackling technique at all or just assumed to know what they're doing. Holding or stopping players in any manner whatsoever may be considered good enough.
I remember Darren Garforth admitted to have never been taught to tackle at all by the time he was in the England team.
The issue arises from how they were coached as kids and unlearning that is difficult. A big bugbear of mine is players who always carry the ball in 1 arm so aren't in a position to look like they might pass. It stems from fast, elusive or big kids who always score tries but never pass because they don't need to. Daley is an example of someone who carries in 2 hands but there aren't that many.
The way things are going I think some scientific analysis is needed to work out how a team can effectively stop opposition players, by using techniques as individuals and combinations, while reducing risk of red cards and penalties. The really smart sides will do that eventually.
Unfortunately, to answer the OP, if a team get away with an orange card then it only targets individuals to do better and abrogates the coaches' responsibility.