'kay, so I was gonna write a reaaaally long post on why this weapon is great specifically at what it does, but then I looked at it and it was too damn long, so I shortened it into tl;dr (because even I wasn't gonna read that).
This is definitely the "work behind the scenes" weapon. I have yet to use it in Splat Zones but it's ability to outpace everyone and the fact that it doesn't have to worry about painting in that mode means it runs straight to the cap point while also giving your team a free line to follow in at the same speed. In Turf War, the splatter actually covers a lot wider of a distance than a roller would. You can't cover up as much in the same time as a roller, so instead you should use the splatter to cover up enemy territory, or help your team with some big spots they missed or lost. It's not an up close and personal weapon, but if you're tricky enough, it can be super annoying, since it's got decent spread at a really good speed, meaning you're doing work while being hard to kill, coming with territory covering distractions in the form of Sprinkler/Inkstrike. Unlike the roller, you can create pathways for yourself besides the one you make by walking. A lot of situations where three people tried to kill me felt like they were locked in a room with me and not the other way around. Even when I died I had been a 15 second distraction that let my team cap a point, push, or get a special out. And the melee isn't too bad either if you can flank - getting to high ground ain't so bad with this thing, so while dealing with enemy fire is a pain, I had way more options to get closer to them than with a normal roller.
In general I rarely ever felt like I wasn't contributing to a match - almost all of my losses were really close, with a few 30% to 50ish% victories for the other team. If your team isn't doing much, neither are you, but even then this weapon has some powerful game changing potential. And it'd probably be a lot scarier with certain perks (most of what I had on, since I didn't swap, had to do with my special meter or run speed, with no stealth perks or damage buffs).
So I'm definitely a yay... I've wanted to use this weapon for a while. I actually like helping my team get work done, so this works nicely for me. It's what I wanted out of the rollers but couldn't achieve because of it's speed.Tho' as far as kill power, normal rollers still have this beat. It's not impossible to take out groups of people shooting you, but it ain't fun either...