We've been to the bus early, but then I just stand around at the park entrance and be bored. Sometimes we stand in big long lines waiting for the security check to open...I'd rather stand in the bus line back at the hotel. Also, we don't get to sleep until midnight, and the kids can't get up at 7:30. Heck, I had to kick them out of bed each morning at 8 so that we could leave at 8:30. I've been kicking them out of bed in Disney for years.
I don't mind being on a crowded bus at all, I just don't like a huge line; it I think it looks bad.
By the way, I blame it all on the new parking charge. I believe that because of that, more people are avoiding driving their own or rental cars and just using the Disney buses, and thereby flooding the buses. So for people like me who never drive in WDW, we still have to suffer the consequences for the new parking charge.