High School graduation is a mess. No one ever just sits when the process starts (reminds me of weddings...which is better I admit). Sims are all over the place. It's chaos. My Sim was the valedictorian. She sat there and watched the valedictorian who didn't exist. There was no one there giving the speech. Those that WERE paying attention, nodded and would respond like they were listening to the invisible Sim. It should have been my Sim. In my prior experience, my Sim would have the game send them up to give their speech. Something isn't working right. The graduating Sims did go up to get their diplomas. The physical diploma was delivered right when my Sim graduated, so that wasn't an issue at all.
Valedictorian may be broken. It would be nice if High School graduation had a mingle time (so everyone arrives), game then makes everyone sit to prepare for the ceremony. The actual Valedictorian gives their speech. The diplomas are handed out. Maybe as each graduating Sim is getting their diploma a couple family members yell out or flash a camera. Then the graduating Sims gather in the front to throw their caps. The graduation ends. I know it could be done. Similar to aspects of the prom and the "fixed" weddings. PLEASE fix the mess. It could really be fun.