Don't worry, they will step in now that Cork are getting physical. It'll be the Nash penalty all over again.
SNIP
Some of this phenomenon is due to bad coaching. There is more skill in timing a shoulder than many seem to realise. It's more about having his body bounce/move into your uncoming shoulder, than it is about just going hell for leather to clean him out. If you can hit a guy just right, it takes less force than you'd think to knock him down. His being just off balance when he hits you, does half the work. If Cork are going down this road, you'd hope the coaching will improve.
But, excepting that one error in judgement, Kingston did a great job, has a big future, and deserves a lot of credit.
See the way Downey lined his man up and poleaxed him fair and square with a great shoulder.
You're dead right about the timing of the shoulder. If the furthest foot from the shoulder is the only one on the ground the recipient gets knocked down, if it's the near foot on the ground he can react by putting the other one down and he doesn't fall. Timing is critical and a lighter shoulder can put him down when a heavier one mightn't