Maybe it's just me with my apocryphal pre-3e knowledge of the D&D world,
but I missed "Too bad we butchered that toy maker, huh?" and [empty a bucket of water over his head] when Wyll announces his Blade of Avernus rebranding and wants to celebrate it on the eve of the big fight. In my head canon we had crossed the Rubicon Chionthar with Gortash by freeing the Gondians and blowing up the Steelforge Foundry. (I had expected at least any Gortash-loyalists to be hostile after that.) So, with the Lower City done and the third stone in striking distance, we went for a nostalgic trip back to Rivington to complete the Dribbles puzzle and dive into the Wyrmway, with my Tav tripping that she'd have Lae'zel on a Red and Wyll on a Bronze Dragon for the final showdown. Amazing dungeon quest ending so badly with being forced to fight and kill an awesome potential ally and finding out yet more things the Emperor forgot to mention. This was a huge anti-climax for Tav and not a little plot twist for me. Then Wyll announces that - instead of doing any of the sensible and useful things now open to him, he wants to change his fight club name. I found this ending for his otherwise great story a bit silly and didn't take Wyll on any of the remaining missions, although he used to be a mainstay for boss fights. After how I buffed-out his Eldritch Blast he should have called himself the "Mystic Bazooka" instead!
While the dialogues do give the option to tell Wyll to focus on the Elder Brain instead of planning his rebranding feast, I would have loved to give my Tav's frustration with this result a few more exclamation marks.
