I understand why people find it boring. The largest flaw in the show, in my opinion, is the use of the goofy humor taken straight from the movie. It feels very incongruous with the beauty and creativity surrounding it. However, for me that flaw was easily overlooked.
What I find great about the Lion King, is that it IS a spectacle and it IS visually stunning, but unlike Spider-Man, the creative visuals actually enhance the storytelling in a magical way. I too, found myself frequently crying throughout the show, not just in the opening number. I definitely think that it's easily the best of all the mega long-runners on Broadway right now (Wicked, Chicago, Phantom, etc.)
As with every show, there will be people who dislike it, but there's no way of knowing how YOU will feel unless you see it yourself.