I have this strange perception of 4T+3T, you know, very few guys succeded this combo during the last couple of seasons, who do I remember doing it: Chan, Menshov, Ten (??? not sure), Machida, Kovtun, Mura- I don't find this combo exciting. This combo (though it's a tough one, I mean- 7 full rotations with 1 landing in between) looks a bit old-fashioned to me. Cause this 4T has been around for so long in figure skating, we got used to it. 4T+3T- wow, well, top skaters were using it even a few cycles ago. Whereas new quads seem to be more excting, those who jump them in combo seem to be the new heroes (Boyang, I'm eyeing you from here, hallo!). I even find that 2 different thriple jump combos are more interesting than those 3T+3T.
So I don't want Yuzuru to spend time on mastering 4T+3T, especially for the second part of the LP. No need to kill stamina for nothing. His diversity in jumps field is the key to success, he really needs to fix the Lz and make it in successfully landed combos.
Also I find Yuzuru's 4T execution spectacular, he way he goes into the jump and lands it- it's my personal guilty pleasure to watch.