Very well, [@Lucius Cypher]. If that is what you desire, that requires a consistent ruling in case it is brought up again in the future. And let me try and create one quickly...

[u][b]Intercept[/b][/u]
Choose any number of creatures within 5 feet of you. By expending your action and reaction, you prime yourself to absorb any incoming attacks in their stead. When any of the chosen creatures is attacked for the first time until your next turn (I find it hard to word this, though it only works once. One attack, one of the creatures chosen to be protected), you intercept the attack/spell, directing the attack towards yourself instead. However, this reckless action grants the enemy advantage on their attack roll.

What say you? It differs from the protection style by actually moving the targeting of the attack, but it does come with a drawback severe enough to not make Barbarians consider to just become walking HP pools for their spellcasters in later-game content. Or perhaps the action economy penalty is enough on its own. I would value your thoughts as well, [@The Harbinger of Ferocity].