Presumably there's an additional motivation to be on time in the form of the most cantankerous of the Firstforged's number. Megatronus Prime does not like to be kept waiting.

"The Acolytes are indeed here for practice, but I would rather see you fight one after I've granted you your boon. It takes time to acclimate to new abilities. The question before us now is simply what gift would benefit you the most."

Which is why he's scrutinizing him right now. No offense, Blurr, but you look scrawny all around to him.

"What have you in the way of weapons systems?"