NW operates OGG-SEA also but the flight will arrive in the South Satellite. I agree that 25 minutes is not long enough to connect to the DL-operated flight to ATL out of A. If you were transferring to another NW flight to MSP/DTW and the connection was also in S then it would be a 10 minute walk or less to your connecting gate.
Once DL moves all operations to S then connections (other than with AS) will be a breeze. (Though I much prefer the new A gates.)