I didn't say it was anything special, I said for the best odds of sitting in F.
Anyway there is no true E+ on the LAX-JFK planes. All of economy on that flight is 34" pitch, 17" width.
F on the 737NGs for LAX-CLE-NYC is 38" pitch, 21" width in leather seats and have free directv, food, and bev. The CPU odds for a 1K are nearly 100%. Of course it's not a nonstop but that's not what he was asking for.
LAX-EWR often sells out with revenue tickets or paid upgrades, there's very little CPU inventory and LAX-JFK isn't CPU eligible.