I've never actually read Dante's Inferno, I'm just sorta-familiar with the concept, as most people are with classics that well-known.
I would definitely not include a Layer for Atheism or Suicide. I was not aware that those were in Dante's Inferno. I was more going to base it off of the more well-known 7 Deadly Sins (translated into D&D terms), not anything from Dante's Inferno, really. I was just pointing out that the 9 Hells come from the 9 Circles of Hell in Dante's Inferno, not saying that I was going to base the 7 Hells after any part of Dante's Inferno, really.
So, yeah, having Atheism and Suicide be "deadly sins" is definitely problematic (to say the least), and I would not include that in this plane of hell.
I was going to be careful with Lust. I was more going to do it as overindulgence in the carnal pleasures than the stereotypical "extramarital sex is a sin". Kind of like Gluttony being overindulgence in food (which also has the potential to be problematic if it comes to fat-shaming, which I will absolutely avoid), to the point where that's all that you think about (think Yeenoghu and the Gnolls' never-ending hunger), but applied to sex, drugs, and music. Do you think that would be less problematic?