So you don't like the speed of Kami torps i understand. Mutsuki has 8km torps vs Kami 7km torps. If we bring Kami torp speed to Mutsuki level, it will have 63knots base torp speed vs 68knots. This 5knots difference practically wouldn't exits/matter for good players who are the ones taking advantage out of it anyway. But since we bring Kami to Mutsuki level, it means we will extend its torp range to 8km as well otherwise it would be an inferior ship.   We kept the concealment at 5.4KM. We kept the torp reload same which is still slower than Minekaze by the way.  Okay, now what we have is a Kamikaze with 8km torps, 63knots base torp speed with 5.4km ship concealment.  Or we can keep the torp range at 7km which would give us a Kamikaze with 7km torps (inferior to Mutsuki), 63knots base torp speed (same as Mutsuki) and 5.4km ship concealment. Well, what is the purpose of having a Kamikaze at this point? Mutsuki has same or better parameters in almost all fields now including torp alpha damage.   What WG said was premium ships do not necessarily have to be better than their counterparts but similar ships with different gimmicks. In Kamikaze case, its torps speed is the only thing separating her from the silver ships. Take the torp speed out of the equation as shown above, and it is a worse or same ship than its silver line sisters. It basically becomes inferior and hence serves no purpose as  a premium ship anymore.