I think it is important to make it as easy as possible for people with little or no understanding.
For those people GParted would be easier.
If somebody wants a challenge, they could make an installation extension.
This extension could automatically download GParted, then allow the user to set up partitions. Then ask which partition they want Tiny Core, and automatically download Grub and set it up, then set up MBR. It could give users certain choices.