It is really just for fun…
I would like to know based on your creativity (could be only a justified fantasy of your mind) the reasons why Blizzard do not have a Duck class in World of Warcraft.
Please, be creative… tell me how would be your Duck class, make jokes and have fun with this post!
Slaps hand on the Evoker
Here’s your Drag- I meant, Duck. It can even fly!
Someone would name him Donald.
The guy who worked on the duck mount in Dragonflight got laid off. The guy who took over his work got laid off in the second round. The new guy they just hired won’t touch the thing with a ten foot pole.
Which would give them a Cease and Desist from Disney.
The Little Indie company can’t afford another lawsuit.
Meh, there also exists a Howard the Duck so I sincerely doubt that if people were to be persistent enough.
They saw what happened to Vulpera and knew they couldn’t do that to the ducks…
… …? … … they let Vulpera play a Death Knights? I don’t see the issue with that.
Give us Death Knight Ducks! Arthus would be proud!
Because people would abuse the selfie camera toy and start to trend the whole duck face again!
They already have, though they gave them the name “rogue”. I’m not sure why - they seem to be ducking all the time.
When you say “Duck” class, do you mean “Duck” as in the animal or “Duck” as in crouch?
They did ugly weird lizard, I think duck would be way better. 
Because they don’t know if it’s dodging or quacking.
By “Duck class” I mean the animal duck as influence for Blizzard to create a class like they did with Pandas. 
(but as you may noticed, I am having fun with this hypothesis)
I’d understand, if you wanted a bird-like allied race or a duck/goose druid form, but a class? The hell?
Because dodging is easier than ducking.
This is really old now but… we could call it Dolan and it would be fine. With Gooby as pet.
I see the Duck more as a class that has the power to apply water spells in dry land, his imagination makes him fly-on-the-ground (like swim) and can perform a duck dive to mitigate damage with his butt at top of the surface.
His main skill is called “Splash!”
This class may have some % increased skill when they fight in the middle of 2 friendly characters (like doing a line of ducks).
He can be a Alliance character against any form of pollution and fel corruption of living things. Ducks loves any living things and adore to see smiles on others faces, that’s why they love to party with Dwarfs and beer… but they hate anything related to death and are unable to understand dark humor. They ignore the Forsaken!
Instead of emotes, Ducks would have distinct quacks list that are not possible to translate to text (you will have to capture the feeling of the quack in its context to understand, like rage quack, love quack, funny quack, silly quack, confused quack, train quack…)
Only able to communicate by quack emotions (not words). This is their only language, because words may offend, and a quack emotion is similar without being offensive.
Do not tolerate to be humiliated when someone calls him a chicken! 
Hates cooking, but loves to fish!
Rice will make him vulnerable!
May have a temporary power forms like a goose tank form, a swan healing form and a Mallard damage form (or a black swan form for shadow priests).
“Walks like a duck (Waddle) and not like an Egyptian” love parties of Quacking Break Dance.
About its dance, I think that “M.C. Hammer - U Can’t Touch This” would be a nice inspiration for Blizzard.
What is the advantage of having a character like this?
It would be a class based on emotions, you do not use words to express yourself.
Its quacks list of expressions creates a universal language that can be recognized by anyone in the world, without the need to learn a new language)
All ducks have affraid of the"Deadpool", but the place is known by its beauty and “The Duck Divas Club”. (underground, it has a city influenced by Undercity… thats cause ducks fel deaths)
Any Duck character may have 1 time opportunity to choose if it would be a short or a tall character.
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I am writing only for the fun of to imagine how would be a Duck class in the context of World of Warcraft, but I do not believe this will ever ever happen.
Because they already fill the role of Scrooge Mcduck 
Reminds me of a thing i done a few years ago…
OK, think I’ve got Fear Of The Duck…
Have you scraped your webbed feet down the wall
Have you felt your feathers crawl
As you’re hiding from the knives
Are you scared to take a look
At the little kitchen room
You sense that chef is watching you
Fear of the duck, Fear of the duck
I have a constant fear of hoisin always there
Fear of the duck, fear of the duck
I have a phobia that Kung Po is always here
Watching horror films the night before
Debating orange or plum sauce
Chinese menu on your mind.
Maybe your mind is playing tricks
You find it hard to resist
The waving airgun between your eyes.
Fear of the duck, fear of the duck🎶