I used to always play with rollers, the carbon deco in particular, and I've noticed that even now, I tend to get in a pretty 2D mindset in battles, so I wanted to think of something that could bring in aerial strategies more, and I guess I still wound up being influenced by rollers.
Propellers-A weapon class that spins a blade to sling ink, and in doing so thrusts the inkling in the opposite direction. Ink flung out is similar to sprinklers, not a lot of damage done, but it could cover a bit of ground. This can be used to run about the speed of a paintbrush, but you must be facing the opposite direction, leaving you vulnerable. The main point of interest in this is that the propeller can actually be pointed down* to allow the inkling to fly. This has a number of useful applications, but each with their own costs.
You could get to the higher ground earlier on in a match, but since the propeller has very little range without forcing movement of the player, the most use you could get would only be able to secure it for a teammate, or maybe chuck a few bombs.
-You can get above an opponent (excellent for taking out a charger) and even fall on them to squish them, but if there's someone else nearby, they're probably going to get you out before you can fly away.
-You could get above a fight and help your team a bit, but your constantly-draining ink won't give you a lot of ways to do so.
-You can travel a pretty nice distance, but if you run out of ink, you might fall into enemy territory or off the map entirely, and while you're in the air, you have no defense besides dodging should someone spot you.
-Flying can keep you from a lot of bombs (and it'd be especially easy with bomb sniffer), but suction bombs will actually latch onto your propeller, a near-guaranteed splat. (To avoid being temporarily invincible, any height able to be reached with ink saver main would be able to be counteracted with bomb range up.)
As for other pros and cons:
One could escape easily from a confrontation, since spraying a foe would also send you rapidly back. But fighting more than one squid will be a lot harder.
Very easy to ink up turf.
Bubbler would be really awful to get. If you were in the wrong spot in the air with bubbler, you have no walls to stop you from being pushed away, and you'd lost time and get splatted.
*I think pressing a button to make the switch would be a better mechanic than just angling the camera, and A, B, L and Y seem to be unused in battle
A few different designs:
Regular-A recycled ceiling fan or electric fan. Pressing ZR revs a cord to get it to spin, taking you up in bursts, with a little descent as you pull it again.
Lighter-A helicopter blade. Similar to a carbon roller, this is the faster propeller, but it spreads less ink to do so. Has a button instead of a cord, so you can just hold ZR.
Heavier-The rotor of a large ship, or a ship's steering wheel. Shoots out more ink, but moves much slower, and can't go as high. (more delay after pulling cord)
Subs: Point sensor, disruptor, beacon (all more support-orientated, just like the class), burst bombs (less ink makes it easier use in the air), ink mine
Specials- Echolocator, inkstrike, kraken, killer wail (Bomb rush would be good, but I'm a bit worried it could be too OP), squid jump**
Good abilities to run: Ink Saver Main-Since the propeller's what will probably be used most.
Ink saver sub-Good to have something to actually attack with.
Not very good abilities-Anything relating to super jumps
I feel like this could be a fun addition to the game, it's not too strong or weak and opens up new ways to play, especially if used in a squad that communicates. (Someone could fly to a spot for a charger or the goal in a ranked match.)
**squid jump was another idea I had relating to playing more in the air.
"A new development by Ancho-V games, this actually projects a life-size version of Squid Jump to play!"
It'd create a few platforms around it and a few fish to grab similar to the power-ups in game. The same platforms would appear in the same spots rather than appear randomly, which ones appear just depends on how close they would be to where it was activated. Platforms would last until being jumped on five times, and the power-ups could work for anyone that grabs them.