I think the biggest issue for the Lakers is Reaves/D-Lo are just inconsistent. Reaves to me is another version of Caruso/Kuzma, guys who get hyped because they play in LA with Lebron but really, they are good players, not *great*. Reaves has done well the last two games, but was bad the first two. D'Lo has also had two good games, but also two bad games including a horrific Game 3. They need more from those two consistently.
AD is a big reason they are even in these games with Denver. I don't see him as an alpha either but he and Lebron are doing the best they can. They can only do much though unless you're expecting both to score 40+ (or one guy to score 50+)
LAL's bench is also a lot weaker than recent years, partly due to injuries.