A little infilling of yellow to take away the paper white of the sun would make it a very fine image imo, but very nice as it is. The puffin is a very fine image.
Yes, I encountered the same yellow cast (and some posterization) when I shot rising sun in the Vosges this spring.
Some "Photoshoping" cure the problem with less yellow cast around and sun filling with light yellow.
This would bring this photo to a high level.
I like the puffin too, nothing to change here, perfect like this.
Thierry