In minecraft, I've realized that there don't seem to be much plants. Even though I see trees, flowers, tall grass, the occasional pumpkin and/or sugar reed, I think that Minecraft should have more plants in a future update-also, I think they should add harmful plants- after all, there are many poisonous and thorny plants in the real world, but somehow only the cactus makes it to the world of minecraft.

The effect of adding better plants will also improve other elements of Minecraft-

-Poisonous plants can be used in potions; improving the brewing element; and with the use of the potions in splash form, improving the pvp system,
-More cultivatable plants will result in an improved farming system and survival strategy,
-More plants in general will create a more colorful Minecraft.
-More colorful flowers will result in easier-to-find dyes,

Better Plants will increase the depth of Minecraft by a lot, and this is why I believe that if I wanted to see just one thing in a future update, then it would be more cultivatable, colorful, and even harmful plants.