Sounds similar to when they used to let Guests into DAK early and hold them at the ToL until "The Adventure Begins".
http://www.wdwmagic.com/attractions...g-access-to-the-oasis-before-park-opening.htm
A quote:
"The park frequently has long backups of guests at the turnstiles before opening, and allowing guests to enter through the turnstiles before the park opens should help to
stagger arrivals and reduce congestion. " (Bolded mine.)
To the contrary, having an interior "holding area" (the Oasis) will contribute to a SINGLE RUSH "arrival" when they finally open the rest of the park.
This is one big reason that they stopped having an internal rope drop at DAK, DHS and Epcot a couple of years ago.
This kind of "holding area" opening means that thousands of guests will have already scanned into the park, crushed together near the "ropes" and will be ready to bolt as a mass of humanity when they drop the ropes… half heading to Everest, the rest heading to Safari.
(They reinstated the internal holding area at DHS when they offer the "Frozen rope drop show" there... along with the expected RUSH of guests to TSM when the "show" ends and the rope drops.)
Very strange that they are doing this at DAK.
It is likely just to allow uninformed guests to pre-book FP+ before park opening time
(which could also be a grand mess as the kiosks, and CMs helping, could easily be overwhelmed by the crush of
early-arriving guests filling the Oasis area.)
It is also likely that they will have CMs in position to "walk" the masses of guests back to the major attraction destinations.