There's always some "what if, what if" when a skater announces they're retiring. Kevin accomplished a lot, and he really did work hard to improve the overall quality of his skating, especially in the last couple of years. But IMO he could have accomplished so much more with a different coach - a coach that didn't blame his poorer placements on politicks, the judges being unfair, etc. etc. etc. instead of using the feedback constructively.
It's good to know that he has plans going forward, and I wish him all the best in the future.