I know what y'all mean. On my second read through of this weeks group, I noticed more nuance provided to the story through the artwork.
For instance: in the second issue, the frame where Rick encounters the scene of the Family suicide. On the first reading I didn't notice the large crucifix hanging on the wall. The scene takes on a sadder and deeper note when you realise how desperate (despondent?) this family must have been to violate the unwavering Catholic policy against murder and suicide. Essentially these people were choosing an eternity of suffering over their current situation or (perhaps more likely) had lost all faith and ended the horror.
So, I agree, that taking the time to enjoy the art is essential to getting the most out of the comic. That being said, I've read comics with more compelling artwork than what is presented in these first 6 issues. I do think it gets better, later, but I don't want to get ahead of the discussion.