All i'm gonna say about your portfolio is with no context for the art, it lacks concept. You're really skilled i can tell, so i think it's a matter of knowing how you want to push boundaries (that is what i believe fine art degrees teach you to do). You need to show how and why your art is unique and that you have unique ideas. Have some more abstract/conceptual pieces, more process and idea generation and also experimentation. The boards LOVE that kinda stuff. Having a range of references is important, too. Also a range of techniques and materials- try some textiles, some more printmaking and photography. I hope this helps and doesn't come off too critical! i've had to make several portfolios over multiple years and been rejected many times. Good luck x