My two questions become, does this open the straight and what does this do to Iran/Pakistan relations.
As far as i'm aware, there hasn't been direct communications between USA and iran. Pakistan has been doing the middle man communicating.
What's generally stopping the ships from exiting the strait is the insurance clubs who has refused coverage for passage.
With a ceasefire in place i do believe insurance clubs will allow, under coverage, for ships to transit the strait.
Yes Pakistan has mediated, and has invited iran and us diplomats to Pakistans capital, Islamabad, on 10th of april for negotiations to end the conflict entirely.