Spear + Shield Interactions and Monster "Plalanxes"

This idea is a bit complex, but I honestly think that now is the time to add it as we have some proper opportunities.

The recent announcements are wonderful, and got me thinking. The Spear was widely used for pretty much all of human history, and I think that there are so many things we can do to add more to Minecraft based off of this history. I think Spears and Shields should be able to work together. I mean, it just makes sense. From Hoplites to Knights, the Shield and Spear have always been together. I don't think the current Spear attacks shod be changed, but instead, I think that when a player uses a Spear and a Shield together, they would be able to do jab attacks at any time, with the Shield up. If on a horse, the Spear could not go "Full-Tilt" while the Shield is up.

On top of this, if the player blocks with the Shield just in time, I think the damage should be reduced by a lot, and the Shield AND opponent's Spear should be disabled for a time. I think this would add some interplay between Swords and Spears-- A player with a Sword can pull off a "perfect block" to open the opponent's guard and get an attack in. Now, I think mobs should get a new behaviour to suit the Spear-- Picture a group of Zombies, all armoured with the same trim applied, each with a Spear, and a Shield with a pattern. They move together, and when the player approaches, they will all use block and attack together. I think this could be an incredibly fun challenge at night.