Minecraft needs more challenge! (yes, even more)

First of all, i don't want the game to be inacessible to younger audiences, or simply casual players, i do not aim to do that by proposing more challenge, however, i feel like minecraft in its current form, is greatly limited by how easy it is.

First of all, i think that challenge should be done differently, don't just make mobs that hit harder, that attack faster or anything, challenge should be implemented by brand new mechanics and attacks, and my main problem with the lack of new mechanics and attacks, has to be...

The bosses: as much as the wither is iconic, its truly an annoying fight, with nothing more than the spamming of his skull shooting attack, and also it doesn't help that the boss floats away from you during the entire fight, bosses like the wither should have multiple attack patterns and be 100% focused on the player at all times.

Reskins: I feel like some enemies could do with special attacks, especially the type of enemy that i call "reskins" (those being husks, cave spiders, drowned, and etc.), while i don't think that these enemies need to lose their original attack, it would be fun, if for example, the husks  were able to throw sand at you, to make your screen slightly dirty, maybe the drowned would be able to drag you deeper into the water, and the cave spiders be able to spit cobwebs at you (+ renewable source of cobweb)

as much as i'd like to continue, the character limit is way too small to allow me to, however i think you can understand me by now.