i think the regular ink bomb is probably the best projectile in the game because of its radius and 1 hit kill. amazing for area denial. if you throw it down a chokepoint you basically force the team into a situation where they have to:
- retreat and lose territory
- rush past the nade's radius and into your territory, where you have the upper hand
i would not pick a loadout without it, personally, though you can still be competitive without it imo
in the demo i tried the splat bombs you get from the special on the splattershot, it didnt seem actually effective at killing people. it didn't have to detonate, sure, but it had such a small radius and the time to kill with it was actually slower than just shooting people
it wasn't in the demo, but i think splat walls are going to be great too. you basically create temporary areas where the enemy team cannot progress. for example, in ProJared's splat zone video, someone on his team threw a splat wall next to the crates and slopes on walleye warehouse and denied the enemy team a lot of coverage for them to advance. since they had to focus on taking it down, it bought his team time to cap the splat zone.
there's going to be a lot of "wall spots" like that in the game that buys you a lot of time to tactically reapproach the situation. i'm very interesting in seeing what the competitive community does with them.