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Also probably important to note a few things to aid in your decision:
The NW seats you had on the 747 are probably inferior to AA's 777 F seat (the flagship suite) and IMHO are also inferior to AA's NGBC seat on the 767 and in J on the 777.
NW/DL is about to have a bunch of 757's moving about. I'd look for a bunch more 757 seats to HNL.
You were rerouted in to apaid seat....I have a metric ton of NW/DL miles in both programs and have found AA to be about 18 orders of magnitude easier to redeem.
Of course YMMV, but be careful. I spent almost 8 years flying the wrong airlines after a situation almost identical to yours. I leanred that one flight a pattern does not make....and pick carefully.