I've also been thinking of a similar idea to Rubik's cubed, sort of a Last 2 Slots Last Layer subset where you insert the second to last slot while solving EO of any LL edges that are on the last layer, then insert your last slot using Winter Variation so you're guaranteed an OLL skip every solve.
Here's an example:
setup: R2 F' U2 R2 B F' U' B' U' F2 U2 R2 U2 R' U R'
R U2 R' U' R U2 R' U' y R U R' // Third slot + EO
U L' U2 L' D' L U' L' D L U2 L // Fourth slot canceling into Winter Variation
U2 R U R' y' R2 Uw' R U' R' U R' Uw R2 U2 // G perm
Here's an example:
setup: R2 F' U2 R2 B F' U' B' U' F2 U2 R2 U2 R' U R'
R U2 R' U' R U2 R' U' y R U R' // Third slot + EO
U L' U2 L' D' L U' L' D L U2 L // Fourth slot canceling into Winter Variation
U2 R U R' y' R2 Uw' R U' R' U R' Uw R2 U2 // G perm