A Reuters report suggests the MOU includes diluting highly enriched uranium within Iran in exchange for $25 billion of frozen assets, but President Trump has not agreed to these terms. He wanted the uranium destroyed, not just diluted, and hawks in Washington oppose releasing frozen assets from 1979.
The Qatari team went to Iran to mend differences; Pakistan said the deal would be signed electronically within 24 hours, but we are edging towards a delay. The Strait of Hormuz remains effectively shut, and Iran insists on management over it once opened.