If you're actually in the market for NYC-Hawaii, Hawaiian just announced that direct route and has (had) sub-$500 fares, all-in.
I'm in the minority here, but I redeem coach domestically. It's a good use of miles because the travel I want to do is domestic. And I'd rather get two flights in Y than two in J. Don't let 'cpm' drive your trip. (disclaimer: I do secretly envy those fancy F trips people here take, but don't see value in them myself).