I'm sure this is true, but wouldn't it also be true that a party with a rogue, twin-blade ranger, fighter, warlord and STR cleric would have a different experience in that module from a party with a warlock, archer-ranger, paladin, wizard and WIS cleric?if you only played 4e with the original books, rituals and all, then have someone who started off with essentials, both running through say, the first 4e module, the Shadow Keep, you're going to wind up with different play experiences.
I don't really know the module, and don't have a view on who would have the better experience, but I think they'd be different.
Or is there some deeper feature of the Essentials builds that you have in mind and that I'm missing?