Good observation. Depending on the assignments, that stretch defense is either Wes's or Hickson's to perform. If Batum is guarding their pest on-ball player, and Lillard is guarding their shortest player, and LA is guarding their tallest player, that leaves Wes or Hickson to slide off their man for a double-team, and since Hickson's probably already moving to box out, and Wes is injured... I bet Lillard's Defensive numbers have taken a huge hit in the last 8 games!
EDIT; that's probably all easily refutable bullshit, but I feel like our team doesn't commit to a double team at all, giving only cursory help before running back to position. That's everybody's fault.