I quite enjoyed act 3. There’s a lot to do in the city, and I didn’t notice that many bugs that others seem to report. A few wonky lines of dialogue here and there, but nothing too serious.
It does suffer from a fair common issue in many RPGs where the story is pushing the urgency of the situation while giving you a load of side quests that your character probably shouldn’t be wasting their time on.
They could have pitched it less about the city being in imminent danger and more that the antagonists had suffered a bit of a blow in act 2 and retreated to the city to regroup. Maybe even leave the big reveal of exactly what they were up to until later, so you could be investigating their plans in between looking for clown bits or whatever.
I agree with a lot of what others are saying about the plot companion story arcs, etc. to some extent. But I don’t think it’s terrible or completely broken. Would be nice if they did build on it and tidy up some loose ends though.
