Combine multi body part

Hello

I have a question about multibody parts...

For example, i have a part like the top left image.. de 2 body's intersect.

I want to remove the joint area, (like the part in the top right image)..

I think it's strange it can not be done by the combine feature, because it subtract the body completely, and i want to subtract only the common body's

I know this can be done with the split feature, but incase of very complex models, sometimes it is annoying to select each little surface for a split operation.. Is there a more easy way to do this??

SolidworksParts And Features