Noise Marine Sonic Blaster rules?

[Alyster Wick]

The concept arose as more than just an extra heavy weapon for Slaaneshi Legionaires but has now devolved under the pressure of game balance.

That's a fair statement.  Certainly as the focus of 40K has turned to bigger and bigger armies lots of character was lost in the name of streamlining.

However, I think the root of our disagreement comes down to two different visions of Slaanesh/noise marines.  To use a solid example, I look at Slaanesh as more of a Hellraiser kind of god.  Lots of whips, chains and leather.  There is a sort of beauty to tearing apart the victims, it makes brutality an art form.  I think you're coming from more of a Gwar standpoint of excess and showmanship.

These two visions are by no means contradictory (perversion and a sensory experience are strong bonds) and one isn't superior to the other (indeed they mesh quite well) but there can be serious tonal differences.  Anyway, this rant is somewhat pointless so I'll just leave it at that.