These are some great breads and this might be one of those bakes that you remember for years to come.
It is a bit contradictory when you think about it to have open crumb and bread that is a little dense because really what we're after is something that feels light in the hand and also light in the mouth.
I do know that when I have a very large batch of dough that it does ferment more rapidly than if it's two smaller pieces of dough. So maybe that is what you experienced here?