I hate being FORCED to solo the storyline quests. I was in a party with my sister and we assumed we would be able to share the experience of completing these quests together only to be told to dissolve our party and do it alone...

However, I don't think we necessarily need the main storyline to be excessively difficult and require a hardcore group of 8 to complete.

In actuality there should probably be several storylines going on at once and/or multiple ways to experience the storyline.