I don't think he's "fundamentally" different. They still portray him as the lying, always on the brink of destruction in debt conman when he's introduced.

Plus, he abandoned his son you know. That's like canonically why Ben was driven to Snoke? What you bring up though is kind of a good contradiction, because what's told to us is that Han Solo is actually kind of a bad father, except what we're shown is that he's kind of fatherly.

Ultimately though Han Solo's "new character" ends up boring and underused. Once people got past the rush of hypernostalgia from seeing him in the Falcon and cumming their pants, they realized what was actually in TFA wasn't all that interesting.

Han Solo should have died in RotJ.