Sword boosting going to stay?

I mean, whats unrealistic about someone jumping off a ship and diving in the water? Essentially thats all it really is. I think its a fun way to board ships and is not a game breaking feature. If you see someone dive off their ship to board, get your blunder bus and point it down the ladder. Problem solved?

I would prefer if this stayed. Imagine a swimmer (say in the Olympics) taking a dive in to the pool. They dive with increased velocity by using the floor or wall (depending on the swim). Pirates should be expected to be professional swimmers (they can certainly hold their breath long enough!) so an initial thrust should not be unexpected. Also with players boarding your ship like that, I'd say it's only your own fault for falling pray to that and not being self-aware enough to see it coming and defending the ladder.
The feature is just a quality-of-life improvement, making it easier to traverse water, especially in short distances that would otherwise be unnecessarily slow otherwise (going from ship to shore).

I really hope the sword dash stays movement skills are always fun. It's not hard to pick up either. If a new player sees another person do it they can work it our fairly easy themselves or ask a crew mate how it's done. If it has to be moved I like the idea of attaching it to a golden cutlass or similar melee weapon. That solution gives advantage to veteran player moreso than I think Rare would like so keeping it as a base is ideal.