That's splitting hairs. Of course they would add their own touch to the game, things they think would work for the better, instead of simply producing an assembly line sequel (which is almost what they did). I don't think Josh means "aimed strictly to these folks and nobody else", but rather aimed primarily to that portion of the audience (which is evident from how the game looks and plays). It just so happened that a good portion of the original fanbase liked what they got with New Vegas. It felt familiar enough. And of course the additions that appealed were made in hopes they'd work like that.