The day after I passed my flight exam, I booked an hour in a Super-Decathalon to go do a couple of spins. It was an overwhelmingly positive and confidence-building lesson because it removed the fear of the unknown for me. I'd heard a lot about how dangerous spins were so I was deathly afraid of any unusual movement of the aircraft because I thought it was going to start hurling me to the ground in some unrecoverable plummet.
Doing actual spins showed me what they really are all about, how to properly avoid them, and recover, and finally gave me real confidence in handling the airplane. I advocate doing them for at least that reason - to dispel all the myth, legend, and fear-mongering that surrounds them, and give the student more confidence. As to the rationale for taking them out of training, I can't comment. I can only say that doing them was an excellent experience for me.