What do you think about Minecraft's skills ?

I think that minecarft should add skills for exemple :

skills:

-ninja <------ makes you walk , climb etc. without hear any noise , and you can walk more close to the mobs without they attack you.

-swimmer : makes you swim faster

-archer : -fire arrows
-slowness arrows
-poison arrows
-smite arrows

and alot more ( i mean 35 more ) this is just an exemple , let me know what do you think about this !