Adding new stuff to Unicode should have a delay, 20-25 years from proposal to the standard (roughly a generation).

In the meantime it's possible to insert emoji into text as smiley, -smiley-, :) , smiley.jpg, ::smiley:: or whatever you want and the system you use is free to change it into a picture.

We end up with standard that is full of ancient symbols from 2000-2025 and new generations of people will abandon them for something else when the culture changes.

Emoji from 80s:

  ________
         /  "Ship Arriving Too Late to    
        /    Save a Drowning Witch"       
       /  /\              F. Zappa