I'm not advocating for a shot for shot adaptation of Heir to the Empire. It wouldn't translate great. But you can certainly cherry pick the best parts of the expanded universe.
Again, the problem is that fans have had decades of pretty good stories that the new content has to measure up to. The expanded universe set the expectations for the quality of the sequels.
What we were given was an absolute disaster of a trilogy. With the high expectations it left a lot of fans upset.
I will agree that they've done a great job working Thrawn into the story. Lars Mickelson is brilliant.
And the common thread for the vast majority of the good Star Wars content the last decade is Dave Filoni. His lot in life seems to be fixing Star Wars when other people screw it up. He did it with Clone Wars when the prequels caused problems and he's doing it now for the sequels. He's having to spend huge amounts of time fixing the "Somehow Palpatine's returned" line.