If you think about it, Hildebrand is an expansion on his own. His side quests last FOREVER, so many hours of fun and joy. We got one for every patch past 2.0 with them growing in length, experimental animations, and just doing more than most cutscenes in the MSQ. My point - his side quests at least FEEL like more than the main storyline in length and depth for me. Would I take a Hildrebrand expansion though? You better believe I would!

Also, rumors abound of Scholasticate in 3.15 being the next Hildebrand adventure, but who knows.