Tall Grass realism

This post concerns tall grass with a height of 2 blocks.

• Make tall grass slow down entities somewhat. Trees and leaf blocks are solid, berry bushes in the taiga slow down alot, but hurt due to thorns. But we don't have vegetation yet which we can move through and slows us down slightly but does not hurt.

• Make tall grass take, say, 1 second to break, 0.5s with swords/hoes? Instantly with shears. So players don't have time to do so during combat.
  
  • Reduce the block hitbox, like fire, so players can swing their weapon at entities freely.

• A biome variant with mostly tall grass.
  
  It makes the wild feel more natural, opens the way for more stealth tactics... the fun this can add. It fits the game well; simple yet effective.