EDITED as this is much better than original comment haha
Okay, especially for you I decided to examine 41 bug reports from subforum.
1) Failed Reports
- A guy reports as bug unability to name army due to his error
- A guy reports non having Wester units on Westernization, not knowing this is intentional
- A guy reports as bug mechanic existing since pre - AOW
- A guy reports as a bug warleader mechanic, not knowing this is intentional
- A guy reports as a bug vassal relations cap, not knowing this is intentional
- A guy reports as a bug unability to annex OPM not knowing this is intentional in new peace mechanics
- A guy reports as a bug Guns Drums and Steel replacing old songs not knowing this is intentional
- A guy reports as a bug the feature of army templates not knowing how they are supposed to work
- A guy reports as a bug grammatical/cultural aspects of Chinese provinces
- A guy reports as a bug holy wars not knowing how they always worked - posted 2 times
- A guy reports as a bug force limit due to him not understanding how it is counted
- A guy wants Falalan remix aded to Guns Drum and Steel 
- A gur reports as a bug supply range stuff which existed pre - AOW
- A guy reports as a bug three remote Asian cultures being grammatically incorrect due to plural form @_@
- A guy posts an issue with fleet template only to it being 'fixed' few hours later
- A guy posts an issue with HRE now knowing it was updated in AOW
- A guy reports as a bug accept rebel demands not knowing how it works in AOW
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2) Bug Reports
- Bugged natives in new Asian and African provinces - posted 3 times
- Trade range bug for a newly formed faction - posted 5 times
- Naval battles don't count into warscore
- Occasional multiplayer/ironman synchronization crashes
- Occasional crash after recalling merchants
- Occasional freezes of vassal armies which stand and do nothing
- AI has problems with evaluation of enemy armies while crossing water
- Minor bug: Unit sprites for Siberian four tribes and Ainu are Western
- Minor bug: Salish Shoshone
- Minor event unrest bug
- Minor bug: Ottoman rebels appear in Brazil
- Minor bug: papal influence can't buy stability
- Minor bug: in some cases the game UI shows 1000x production instead of x production for one month
- Minor bug: vassal evaluation on income overview
- Graphic error with rebels
- Cardinals count bug
- Minor bug: post battle report sometimes shows generic unit sprties when it shouldn't
- Extremely minor bug: marches shown as independent nations on main menu world map
- Extremely minor bug: Nobles Demand Rights for Ming is reduntant events due to no autonomy change allowed
6 significant bugs and a dozen of small so far. Possible to fix in two hotfixes or one patch. Definitely not enough to call a game 'bugfest' - this name is reserved for better cases.