If all you get is Evan Bouchard, that's worth a top 10 pick.
Detach yourself from the current universe of recent picks that everyone expects to end up top half of the league NHL'ers, and take a look back at draft picks from like 10 years ago.
Some of their names you might not know, and others didn't turn into anywhere near good NHL players. If you are picking like 1st or 2nd you want to draft a star, but considering the Levshunov discussion isn't really that and it's more about should he be picked 6th or 20th, there's nothing wrong with a flawed player that has things to work on going 6th.
Levshunov's defensive game is also way over-discussed. He's not playing junior hockey. NCAA is a step up, and he's one of the youngest players in the country. He's 6'2 200, and has shown some defensive ability. You can work with that. He's not 5'8 and a one-way defensemen. Yet, if he was, you can still work with that. Quinn Hughes has improved his defense a lot in the last five years.
Levshunov as a top 10 pick is a no-brainer. The real discussion is top 5 or top 10.