Do these guys need to be added to the 40-man this off-season? That's also a difference between these guys and Giolito, Moncada, and Lopez. Those guys were already on the 40 since they were called up the previous season. Not putting those guys on the 40-man roster this year provides some flexibility in the off-season by allowing you to carry two extra guys.
Edit: if they're not up by this weekend, wait until next year.