>>55497239He definitely is full of regret and possibly even shame... he always seems like he's so heartbroken that he failed Lysandre. Ignored him, failed him as a mentor and a man Lysandre highly respects... he definitely realizes the gravity of his failure but only after Lysandre blew a crater in Geosenge and dropped 10 stories on his own head. Even in the wish fulfillment land that is PMEX, where Lysandre is just alive, Sycamore is still so sad, and so desperate to course-correct. I was always afraid of how they'd be portrayed in PMEX(and Kalos in general tbqh)before they were added but I was pleasantly surprised, they really understood the characters and their appeal... so I hope that the new game understands that too.
all of this to say yes! I love seeing Sycamore miserable and broken down! I think it's because he looks so happy, always putting on a persona for the kids, but you just know he's sad and worried and guilty inside.