I wish her the best in her future endeavors. She is doing what many wish: having a clear, absolute goal and taking the courage, the will, and strength attain that goal, no matter what the cost. She's taken her comfortable standing in AKB48 and decided to not only graduate, but also her agency, in hopes of improving her status and skill in her passion, the art of seiyuu-ism.
No matter what your viewpoint is on Nakaya Sayaka, the idol of AKB48, your viewpoint should be nothing but respect for Nakaya Sayaka, the person. I love the work you contributed to AKB48 and I don't know your feelings of pain of your decision, I will hope nothing but the best and happiness in your present and future days for the rest of your life. It's the least you deserved. Thank you.