Doesn’t 1p1c package relay and package RBF also give us sibling eviction (i.e. a 1p1c package can replace another that has the same parent transaction in the package)?
To fix pinning in LN we still need package RBF, and to make 0-fee commitments we still need package relay. So I’m not sure sibling eviction alone gives us much besides a temporary alternative to CPFP carve-out.