My only gripe is that it's not a Heavy Metal Splatling :(
Jokes aside, I find this setup a lot better for my playstyle than the original Splatling. The main problem with the original is that the Splash Wall consumes way too much ink for me to use it on combat, as the Heavy Splatling also happens to consume a lot of ink. It's a good synergy on paper, a long range weapon with a shield for up-close, but in practice it just becomes a conflict of which of the two should I use.
However, the Sprinkler is the complete opposite. Even though it still has problems with ink consumption, it makes up for it in utility and the lack of bad times to use it (whereas the Splash Wall can only be used in combat, be it during or before). That way I can use my Heavy Splatling for both combat and turfing, use the sprinkler for turfing large or dangerous areas, and the Killer Wail for combat and area-denial, a whole weapon set that works in harmony. Now, the Killer Wail is not my favorite Special Weapon, as I'd prefer an Inkstrike for long-range support/harassment/backdooring, but it does the job well enough.