Thanks for your query,Based on the facts that you have posted it appears that you have end stage Peyronies Disease since 2011.
In many patients Peyronies disease is self limiting disease. Now you do not have any deformity
(Penile Curvature )and If you do not have any problem in getting erection it is better to differ surgery at this stage.
The results of the surgery even in best hands are not encouraging due to the nature of the pathology itself.and complications after surgery.There are chances of shortening of Penis as rightly.feared by you.
Surgery is advised only in severe deformity and importance