Evolution usually does a good job at this, but it takes time and many people won't notice these changes in their lifetime. After reading @whatageek's 3rd unlikely ways to break up with someone this came to my mind and I started wondering how we could hardfork or fix human disabilities that are often just annoying or there for no real reason.
Increased chance at sneezing successfully without having to look at bright lights
Increased control of hiccup rate and to postpone it at a later time
All humans now float on water
Increased reaction and sense to touching something that is really, really hot
Increased time of being without air
Decreased odds of biting your tongue or cheek mid eating
Dislodged eyelashes now have a smaller chance of going behind your eyeballs
Increased control of erections
Decreased how periods affect your mood
Decreased the zapping feeling of hitting your elbow in that one spot
Mental
Improved chances of falling asleep when you want to
Increased chances of experiencing lucid dreams and decreased the difficulty in controlling them - have fun!
Decreased motivation level of of getting your life together when you are about to go to sleep, balancing it out during the day
Decreased nightmare rates and its now easier to become lucid during them to change the outcome
Decreased cold-sweating when waking up from an uncontrollable nightmare
Feelings of love re-balanced to last longer and more even in a relationship
Memory of loved ones decreases faster the less you are in contact with them (this has been requested a lot)
Short-term memory loss improved - no more "why did I enter this room" or "I forgot his name when I introduced my own"
Feel free to add other ones you come up with in the comments, if its good ones that I haven't brought up here I will steal them for Hardfork 2.0 and you might be lucky to get a mention out of it.
