No, definitely not wasting your time.
Not many people pick the Riva intake grate though - Depending on where you ride/how you ride, everyone chooses the R&D or Worx grate.
Keep in mind R&D has two grates for our skis - closed course (crazy good hookup but not as much of a speed gain) and the normal one. Vast majority of people prefer the normal R&D grate.
Either of these grates would also make a big difference, in addition to your intake.