The ratio is a seriously miss-applied factor in brewing. The first problem with it is that it refers to as making a beer bitter or malty. It does not do either. It only aids in the perception of dryness or fullness.
At 150 ppm SO4, there is barely enough in that brew to dry out the beer finish. Even at that level, this beer is likely to be perceived as being fuller or maltier than you might prefer. I've experimented with 100 ppm and 200 ppm SO4 in my standard SNPA clone and it is always better when the SO4 is at 300 ppm. While those other versions were nice, they didn't have the 'pop' that many bitter beer drinkers enjoy. However, this is a personal preference and everyone should come to their own terms with sulfate.