Carronade plus Heavy Clip was good (a Carronade could now actually counter the other Carronade) and Harpoons were good damage-wise too, rather weak actually. As a Junker, I barely noticed armor damage from a Hades/Harpoon Pyra and the only time my balloon died was due to Carronades and scraping against enemy ships.
The Harpoon pull I found was actually really weak too. I don't remember that it was always this weak, but the only time I really felt it do something, was when ships tried to move away from each other once harpooned, so the Harpoon forced them back together.
Independently on how much pull force it has, I want the Harpoon's reel-in to go from "holding right click to reel-in" to "clock right click to toggle auto-reel-in". More often than not the Harpoon is used by an engineer who needs to repair. Since it doesn't do a lot of damage and takes a while for its effective to really be noticable, the person on the Harpoon should be able to leave it and fix stuff. A broken Harpoon should obviously deactive the auto-pull.