I agree about a party of 6. I think, the difference between a D&D game and Dragon Age for example is, that's A only has 3 classes. So you can have them and maybe another mage with a different skill set or a dual wielding and an archer rogue... and you are fine. In a D&D game you have a variety of classes and I want a) try them all out and b) have a character for every situation-a cleric or druid for healing, a thief for traps, a fighter standing in the front, a bard for buffs, a mage or a Ranger for ranged attacks and or crowd control... it's a much more complicated class system and I think if the encounters are scaled to a party of 6, that could be a lot of fun.
"We are all stories in the end. Just make it a good one."