A lot of exciting stuff (Donald Glover!), but perhaps the least exciting part is Han Solo himself. He doesn’t seem like the Han Solo we know.
Then again, the Han Solo we know—at the beginning of New Hope—isn’t all that great a guy. If these movies are to have any character development, it will have to be more a character devolvement. Han Solo may start out a decent guy, and this backstory will turn him into the Looking-Out-For-Number-One scoundrel we know.