I agree with a lot you said. Characters seemed to stuck in stasis for the 30 years between ROTJ and TFA. Han Solo is back doing what he's "good at" as part of the grieving process or whatever? Thats some lazy Lindelof type shit.
That's probably to appease the original trilogy diehards who hate the prequels incessantly. They just added in R2-D2, C3PO, Han, Chewbacca, even Luke rather than tell a completely new story. I mean it was essentially fan service, especially the Millennium Falcon, which magically 30 years later is piloted by Rey and Finn and is at the exact place and time as when they need a ship and are then taken by Han at the same time as they escape Jakku which at the same they get boarded by those other criminals and Han needs to leave his superior freighter and fly the Falcon the back.
So they pretty much just kept the characters stagnant and then shoddily added in exposition. The scene with Han and Leia talking about what they've been doing felt so forced.