Adopted mother slowly starves quadrapalegic daughter to death (including other gross neglect), gets 10-15 years. What is your opinion of this?

Shylae Thomas was rendered a quadriplegic with severe brain damage due to nearly suffocating to death in her crib. link to whole story

Her adoptive mother starved her slowly to death over the course of about a year and a half then stuffed her body in a storage area with mothballs to cover the smell. After her death she cashed at least one check for caring for Shylae for over $3000 rather than reporting the death. The body had bedsores that went through what muscle she had to the bone and was described as as emaciated as a victim of the Holocaust.

And more.

The adopted mother got 10–15 years for this.

I see this all the time on the news: parents who are guilty of deaths by neglect or even active abuse (beatings and the like) who get off with sentences like this one or, often, less.

What is your opinion of this type of sentencing? Is justice served?

(RIP Shylae)