I just think they should have not made it so easy to fast travel all over the place and be able to carry stuff. Maybe two weapons max with limited ammo. It would have made the game a lot more exciting and you would have to be a little more smart about your approach. I know you can argue that you can limit yourself, but I am really big on my experience of my first play through. I know I can go back and play the game like I just said, but it's not the same.
It was a fun game with a lot of potential and I hope that the next installment (FC4) delivers. Especially open world Co-op. Absolute travesty that you can't run around rook island with a friend. Would make the game so much more replayable.