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.
Physical
- 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.
Thanks for reading, may the fork be with you.