One thing of note is that, and this could just be the rum talking (I know... I know... 8:40 AM on a Tuesday while you're at a school!?), but he looked leaner when he was a Junior in HS compared to now.
If that is the case, then he has lost some mass during a critical growing point in his life, while attempting to stay within striking distance of 70 KG.
I imagine the first MFS tournament we see him enter after Worlds/U23s will be telling (Bill Farrell at 74 KG anyone?).