Shortcomings and Longcomings

If according to Meriam-Webster, a shortcoming is defined as "an imperfection or lack that detracts from the whole; also : the quality or state of being flawed or lacking", then by definition the word longcoming should mean the opposite. Could one say that it is "perfection that adds to the whole"?  Probably not, since how can one add to something that is perfect. According to the second definition, one may say that longcoming may mean "the quality or state of being perfect or not lacking anything". Used in a sentence, "Being good at baseball is one of my longcomings".
So why is there no word longcoming? Reference.com defines the word shortcoming as "a failure, defect, or deficiency in conduct, condition, thought, ability"; which seems to focus on the human conduct or condition. With that definition, we have a better understanding why shortcoming's sister word didn't make it into the American lexicon.
Deficiencies in people are a necessary trait for human growth. Imperfection is part of the human condition. It is how G-D has put us on this world. With our lacks, we are able to look to G-D to fill the voids that we are missing. One who suffers from lack of health or wealth can look to G-D. 
Interestingly enough, in one of the after blessings for eating a food, we say "Borei Nefashot Rabot V'Chesronan", loosely translated as "You create many souls and their lackings". We bless G-D for what we lack, because it is those things that we lack, that enable us to rely on and to forge a relationship with Him.
The best part of having a character deficiency is when you find out about that deficiency. When you realize what you are lacking, then you have found out what you can work on to get to a level of perfection with the creator. Finding what we are lacking means finding purpose. It also means looking for those who's qualities can compliment our deficiencies. That's what can make marriage or any other relationship so wonderful, when you see how the other person has the missing piece to your puzzle.
At the end of the day, it seems that shortcomings really are longcomings. When I see what I'm missing, I am perfect, perfectly lacking.