They clearly didn't test this thoroughly.
I could live with some of the bugs for example like the sound of me walking or doing an attack not working but by quickly jumping in and out of the potions radial menu fixes it but the bugs i am away to list should have been fixed for sure before release.
The radial menu for potions becoming completely unusable until you fast travel or exit to the main menu which can end up in you dying if you are in a temple where you have no choice of fast travel and with no use of the potions menu unable to use health potions etc.
Enemies not taking any damage at all no matter if they are a higher or lower level than you. This combined with the bug above in a temple with no fast travel would obviously end up in a disaster.
Unable to finish quests such as The Trouble With Darkspawn where you should be able to talk to Servis but can't so the quest can not be finished.
Tactics not working in 2 different ways. 1. I made Vivienne a spirit mage so that she would be using the barrier spell etc to keep the party healthy and not using up all the potions but all of a sudden she has just stopped using Barrier all together even when i went in to the tactics settings and put a star next to it she still doesn't use it when before the first thing she would do when getting in to a fight would be to put a barrier up on the entire party and that was without the spell being set with a star next to it, just a tick. 2. When trying to use tactical mode in battles the actions are ignored, for example i will set up my mage to use the Revival spell on a fallen party member to revive them then on the PS4 you hold down R2 to advance the battle and the spell does not get cast she will just revert back to casting the normal attack no matter how many times i try to use a spell she just ignores it and obviously when a party member is down the tactical mode is the best place to use this kind of spell essentially pausing the battle and allowing you to set up the spell without being attacked, it also gives you an over head view making it easier to find your fallen party member but it's absolutely pointless if she wont cast the damn thing no matter how many times i set it up she just wont do it!
Dialogue sometimes completely skipping or freezing up where you have to wait 5+ minutes for the conversation to start up again or if it wont play you have to skip it. Extremely frustrating if you are in a main quest or an inner circle quest where the conversation is going to be more important and interesting than other side quests.
I have had other bugs but can't remember them off the top of my head but these are the main ones that i think are important as they affect the way the game is played.