The East is just in a real pitiful state and has been for a number of years. Look at his competition in the past five Eastern Conference Finals:
2012 - the Celtics were on the decline ever since KG injured himself in the '09 Conference Finals. A team with prime LeBron, Wade and Bosh should've beat this washed up version of the Big 3 in about 5 or 6 games.
2013 - an overachieving Pacers team. Their best player was a "green" Paul George who was only starting because Danny Granger was out for the season.
2014 - a Pacers team that were poorly coached, lacked any depth and found themselves gassed out by the time the playoffs came around because they were chasing the #1 seed throughout the regular season. The fact that they went seven games with the Hawks tells you everything you need to know about that team. Meanwhile, the Thunder and the Spurs were battling it out in the West.
2015 - a 60-win Atlanta Hawks team in which Jeff Teague was arguably their second best player that year after Millsap. Meanwhile, the Clippers and the Spurs were battling it out in the 1st round of the playoffs.
2016 - the Raptors were probably the best competition he's faced, but they would've been obliterated by the Thunder, Spurs and Warriors that year.
2017 - hopefully it's the Wizards as they're a "decent team", but it looks like it's going to be the Celtics. This a team with the likes of Kelly Olynyk, Tyler Zeller and Al Horford providing "rim protection". Plus you've got players like Avery Bradley and Jae Crowder playing on the perimeter who you can hide Kyrie out on the defensive end. If the Cavs-Celtics series goes anything more than 5 games it's because the league wants it that way.
The guy is going to have only won 3 out of 8 match-ups against the West after this years Finals, and two of those wins were just about the most flukiest and unconvincing victories ever seen in Finals history (2013 Finals and 2016 Finals).
Although they're young, hopefully that Bucks team with Giannis, Parker, Middleton, Brogdon, Maker, et al. continues developing, because aside from them the Cavs really have no other potential threats in the East.