I think the Special Activation Indicator should come back
I know you can still see when a teammate activates an special in Splatoon 3, but you have to be looking at that teammate to know. Some specials like Tenta Missiles, Zipcaster or Trizooka can go unnoticed until they have a visual effect post-activation or you happen to see them. At least for SoloQ, it would be very helpful to know whenever a teammate is launching missiles or using a Zipcaster so you can know and pressure the enemy team while those specials are active. Maybe it hasn't been so useful, specially in Splatoon 2 where most specials were very noticeable when activated, and just work with a few Splatoon 3 specials, but if Splatoon 4 features more pressure or displacement specials similar to Inkjet, Zipcaster and Strikes, I think they should bring this indicator back. I don't think it cluttered the UI at all honestly, it's small and goes away quickly. Just add it back and keep the Splatoon 3 indicator on top of the player, at the same time.