This falls under narrative more than it does quest mechanics themselves but my suspension of disbelief was shattered to the point of no recovery when Y'shtola was clearly alluding to an up and coming Gubal Library dungeon run for the finale and it instead culminated on the literal doorstep to said dungeon with yet another nameless assault by three dark stooges. I felt the developers had deliberately set me up for disappointment but at least I got to hear that lovely job concluding battle theme from four years ago again as I struggled to comprehend why they bothered with such a quest line in the first place and that they didn't just hand me all the abilities from the get go so I could be on my merry way.