I have taken this flight and, yes, there is very minimal EC.

This is the same 752 config (75E) that is usually flown ex-JFK transcon to LAX and SFO.

Not only are there only 11 EC seats, but, incredibly for a plane that does long flights, many of the regular E seats only have 30" seat pitch, which is truly uncomfortable.

I have sat in row 18 (the right side exit row) and while the solid armrests made the seat narrow, at least there was a lot of legroom.

If I remember correctly, I believe DL is planning to add more EC seats to the 75E.