Yea, there's no sense in wasting the product if you already have it. It's not going to kill your soil by any means. It's just much better for its longevity to use unprocessed amendments, and it saves you money.

As far as recommendations for other amendments, it would really depend on your soil and what you're growing. But just to throw a few out there anyway:

Alfalfa meal will give a nice little boost of nitrogen and other trace minerals, it contains natural growth regulators, and provides a great source of food for soil microbes.

Aloe vera contains lots of nutrients and minerals, as well as natural rooting compounds - great for propagating/germinating.

And you can rarely ever go wrong with adding Earthworm castings especially if they're homemade, as they'll contain many microorganisms that will benefit both soil and plant.