lol yeah he would definitely need to lock in at least if he was forced to do white cross, i checked it & it actually looks better (theres a 6 move xcross with a crazy solution lol, see below) but obviously if you have the planning skills to be able do some mid yellow cross with green front everytime its much easier because theres objectively less stuff to "move around" in your head (the cube is already in orientation), radosław marcinek has done it in his channel "quite easily" according to him, albeit with only 3 pairs
his solution btw:
a white cross solution which i would love to see him try & do sometime:
untimed F2L solve
F D2 R2 D2 B D2 F L2 R2 D2 F D' B2 L F2 U' F2 R F2 R
z2 // inspection
D R' U2' F2 R2 B2 // xcross
y U2' R' U R // 2nd pair
U R U R' D // 3rd pair
U2 R U2' R' U2 R U' R' D' // 4th pair/ZBLS
lol yeah he would definitely need to lock in at least if he was forced to do white cross, i checked it & it actually looks better (theres a 6 move xcross with a crazy solution lol, see below) but obviously if you have the planning skills to be able do some mid yellow cross with green front everytime its much easier because theres objectively less stuff to "move around" in your head (the cube is already in orientation), radosław marcinek has done it in his channel "quite easily" according to him, albeit with only 3 pairs
his solution btw:
Xuanyi Geng - untimed F2L solve
F D2 R2 D2 B D2 F L2 R2 D2 F D' B2 L F2 U' F2 R F2 R
L' D' R2 U2' L2' U' L2 F L' // xcross
R' U R L U L' // 2nd pair
R' U' R y U' r R' R r' R U R' // 3rd pair
U L' U' L // 4th pair
a white cross solution which i would love to see him try & do sometime:
untimed F2L solve
F D2 R2 D2 B D2 F L2 R2 D2 F D' B2 L F2 U' F2 R F2 R
z2 // inspection
D R' U2' F2 R2 B2 // xcross
y U2' R' U R // 2nd pair
U R U R' D // 3rd pair
U2 R U2' R' U2 R U' R' D' // 4th pair/ZBLS