(2) Warlock is poisonous will make you sick (trash), Warrior is too much work for little to gain, Hunter is a joke, if you play it the joke's on you

(1) I dont HS so the joke was funnier to me, I read it as current meta balance (which now I understand is not it, but imagine it is). Mage is frozen (unpatched I guess), Paladin is crap you are playing with little toys, Shaman is awesome, Druid and Rogue were nerfed by Priest who got buffed

The druid pie should just be cheesecake with 3 marcipan treant figureens on top.

Try Dragon's Dogma using GeDoSaTo (improved graphics) and ESB (better lightning / colors - found in Nexus mods). You will enjoy a great game with great graphics this way!

Gee Anduin, why does your dad let you have three pies?

My first thought was that the Mage bought pre-made pie.

For those of you that do not understand the druid pie, the priest stole it, just like he stole rogue's pie

-Warrior is a pie with a thick crust, because they are all about piling up armor on themselves to protect their gooey center

-Hunter is a pie in the face, both as a reference to the Face Hunter build and to their tendency to go all out and "in your face" with a rush.

- And I guess Druid would be a huge energy-drink filled pie to represent all that mana gain and large creatures & Rogue pie would hold the knife and fork to stab you ... if the priest wouldn't have stolen them.

- The armor is probably the explanation for Warrior, but I like to think my first thought of "All show and no substance" works as well :) ... maybe.
- Paladin: The lot of small things is most likely the correct one and don't forget that blueberry is also considered "sour".

-Priest is a stacked pie that they stole from Druid and Rogue, showing that they steal other player's cards and buffs to strengthen themselves.

-Warlock is a nasty, poisonous pie. I guess that one doesn't need explanation.

-Shaman is one big fancy pie because they like to buff one unit to ridiculous heights and then murder you from full health with it

-Druid and Rogue are average (or rather Jo just didn't detail them for the sake of the joke)

-Paladin is multiple smaller pies because they use multiple creatures with taunts and whatnot to wear down their opponent (personally I would have went for a "secret pie" with unknown flavor as a reference to the number of secrets they can put on themselves)

Here is my interpretation, though I would like to preface this by saying that I personally don't play Heartstone, but my co-worker does and it kinda rubbed off on me. Anyways, here's what I figured:
-Mage is frozen pie because they are about freezing the opponent (duh)

I really don't get the paladin one

Mage references Freeze Mage.
Shaman players are as smart as three year olds (citation needed).
Priest stole the pies of everything near him.
Warlocks are toxic and deadly.
Warrior gains nothing but armor all game.
Hunter always goes for the face.

@Dillon
Don't worry, I don't understand this comic at all, other than hunter sucks, warlocks are toxic, and warrior is heavily armored I guess?

I don't think I understand the Druid Pie.