Your list is pretty random, things really depend on type of the school you are in and type of the school you are going to for study abroad. What programs are your considering and where?
Looking at your CONS:
There are other/new activities in the school you will be visiting
New friends and new exciting courses and seminars
Grading could be different and does not mean easy/inflated grades - my son studied CS at GaTech and spent a semester at the Hong Kong University of Science and Technology, where grading curve was brutal! But his tuition was less than in-state in GA and it was an amazing experience overall.