I think Pakistanis are being way too optimistic, Joe might be more sympathetic to Pakistan, but US policy overall prioritises its relations with China and India, as well as with China vis-à-vis India.
And democratic governments have historically been less helpful to us, it’s republican administrations where we get the most attention. With Trump you could at least curry favour through the Saudis and Jared, or directly with Trump and IK. I don’t see our relations getting better. In fact, if joe decides to slow down exit from Afghanistan, we could conceivably go from being important to the exist process back to hearing Obama-era ‘do more’ rhetoric.
It may however be indirectly good for Pakistan, Joe will likely re enter the JCPOA, and that may have some indirect benefits for us.