The former "Listen Later" have been replaced with a Saved Episodes feature. The Saved Episodes feature allows you to make a playlist of individual episodes, instead of just the most recent. To add an episode to your Saved Episodes playlist, tap the episode you wish to save. The show info page will pop up, and to the left of the play button you will see "Save Episode", tap this to add to the list.
To access your Saved Episodes list, access the navigation panel (top left corner) and select Saved Episodes. Your Saved list can be arranged however you like, just tap 'sort' in the top right to choose your preference. To play a desired episode, tap the blue “play” arrow on the right. Episodes that are fully played will be moved from the Saved Episodes section to the Archived Episodes section below. To download your Saved Episode playlist for offline listening, toggle the switch to "Download".
To remove an episode from the Saved Episodes or Archived Episodes list, tap the 'edit' button near the top right. Tap the red Delete button to the left of an episode to remove.