This is a positive and historic development. Not only will it relieve pressure on ordinary Iranian people, it will also empower the country’s reformists. It will also put the interests of the powerful merchant against the interests of the hardliners. It will erode the power of hawks not just in Iran, but also the US and Israel.
This also creates an opening for a negotiated settlement of the conflict in Syria. Until now Iran’s hardliners have been running amuck in Syria, and the IRGC has been actively at war. Now Iran has something to lose. The US has gained leverage that until now it didn’t have. It is now in a position to pressure Iran to drop its support for Assad. Given the fragility of the entente, the last thing Iran would want is to jeopardise it by continuing a policy with an uncertain end.