To me, the East breaks down into four tiers:
Tier 1 - Conference Favorites:
Cleveland
Tier 2 - Conference Contenders (In order):
Boston, Toronto, Indy
Tier 3 - Conference Playoff Potentials:
Atlanta, Detroit, New York, Chicago, Washington, Charlotte, Milwaukee, Miami, Orlando
Tier 4 - Lottery Bound for sure:
Brooklyn, Philly
So while I think we'll mostly be battling for the nunber two spot all season long with Toronto and Indy, I think we're in the driver's seat for that spot with an expected record drop in Toronto and Indy needing time to integrate their new additions.
However, at this stage in Lebron's career and with the team's significant injury history, I do not expect the Cavs to win any more than 60 games max this year, which is right around the average record for the East winners the past 25 years or so. Hell, they've only won 53 and 57 respectively the last two years. Lebron has always prioritized rest over the highest possible seed, since he knows he can win anywhere, so I expect more and more rest from his team the older that he gets with as many miles as he already has on his body. Further, Lebron is due for a significant injury that he's largely avoided throughout his career, so there's always the possibility that a significant injury pops up with Lebron or one of the other injury-prone main guys on the Cavs, e.g. Irving, Love, etc.
What's more, though still overall weaker than the West in top talent, to me the East significantly improved as a whole and in depth this summer with essentially 12 teams with legitimate playoff hopes. When the conference is deeper like that, it creates a smoothing effect with the top records, meaning overall lower win counts in the top of the bracket. This has actually happened several times in the East, too, and there's been several years where the best East records were in the low to mid 50's in wins with several other teams in the 50's, too.
That's the situation I see playing out this season with a lower overall top East record and several teams in the low to mid 50's. It wouldn't surprise me in the least to see a two or even three-team race for the top seed late into the season, similar to how Toronto pushed Cleveland to the end this past season.
How much would getting the top seed mean for our chances? For a younger team without a ton of playoff experience and with a great home court advantage, I think it'd be pretty substantial for us.