That crack in the heel looks bad to me, and I see another one opening up as well. One suggestion might be to cut a slot at the back of the heel, and epoxy in a stiff piece of wood. This could be "key"-shaped to act as a "clamp", drawing the ends of the neck together. You will have to be inventive here, to make up a system which will allow you to "clamp" that piece of wood into the slot, heel to head. I am hesitant to suggest a hole from one side to the other (between the front and rear mounting screws) with a dowel epoxied in, seeing as there is not much wood left around it. A thin dowel maybe?
One trick I never got to work as well as suggested is to "flow" epoxy epoxy into the cracks, using a hair dryer to heat up the epoxy to a watery state. This obviously depends on the type of epoxy used, and the heat will affect the curing time too.
Hmm, I would go for the "clamp" at the rear, with superglue (super thin type) wicked into the cracks as well. They tell me superglue does not last forever. No glue does, I guess.
I agree on the frets - could be salvaged.