In their defense on that front, they have kind of said more than once that they're more a pop culture convention than a pure comic convention, and in terms of movies, tv shows, wrestlers, etc. they do get a higher quality of guest than LACC usually does.
They do get some good comic guests like George Perez a few years ago or Mike Grell. But the convention industry has just reached a point where comic creator names aren't the ones selling tickets so much these days.
Oh, I'm not questioning any of that. I'm just speaking of my personal preference. Like I'm perfectly sure that I'll be enjoying HeroesCon and Baltimore CC more than I did Megacon last weekend because their lineups are 100% comic book creators.