4Lo at JO is like a tradition by now lol, but pretty sure he wants to stabilise his 4S first and be comfortable with jumping it together with Lz, F and T in one program, before even thinking about the 4Lo.
I also think he'd benefit more from attempting a 4T+4T combo in the short, before putting 4Lo in his free (which for him pretty much equals 6 quads, sigh. just no).
I do hope he takes it easy this time at JO with a watered down content, but for some reason he seems to be itching for some thrill at the beginning of each season, after not having competed for so long. (jk)
If I'm not mistaken, I believe that 4T+4T is not allowed in the short program, but I would also love to see it too.