I’d expect some possible complications in securing awards to include award seat reductions, schedule changes and perhaps some schedules dropped as the fleet reduces from 5 to 4, and Poerava Business seating is reduced from 32 to 30.

Boeing 787-9 “Tahitian Dreamliner” seating:

C30 (Poerava Business) 2-2-2 Rockwell Collins (née B/E Aerospace) Parallel Diamond (similar to J in the AA A321T or J on QR 777-200LR); lie flat but not all aisle access.
W32 (Moana Premium) 2-3-2 Zodiac Aerospace Z535 Premium Economy class seats.
Y232 (Moana Economy) 3-3-3 in two cabins, with Zodiac Aerospace Z300 Economy class seats
for a total of 294 seats

TN 789 seat numeration is:

Poerava Business: rows 1-5, columns AB, DE, KL
Moana Premium: rows 10-15, columns AB, DEF, KL
Moana Economy: rows 18-46, ABC, DEF, JKL

The departing Airbus A340-313 is C32, Y264 for a total of 296 seats.

Members have previously submitted some important information on successful award bookings on Air Tahiti Nui. These have been summarized and included in the Wikipost - be sure to read it.

Below:
Boeing 787-9 “Tahitian Dreamliner” new color scheme
Rockwell Collins (née B/E Aerospace) Parallel Diamond Poerava (Black Pearl) Business seat pair
Zodiac Aerospace Z535 Premium Economy class seat pair
The C30, W32, Y232 (for a total of 294) seats layout