It does seem to me that Delta can't make up their minds when it comes to MAN; JFK was constantly being downgraded before eventually being cut altogether. Now it's coming back but already the start date has been pushed back and equipment downgraded and given how we are always being told that New York is underserved from MAN I find it disappointing that US carriers can't seem to put on anything larger than a 757.
Then ATL, a route which has always been fairly constant. A few months ago DL planned to upgrade to the 764, then changed to the A332, then back to the 763 before handing it over to Virgin! The Virgin/Delta plans must have been in the works ages ago so why were we hearing about all these planned equipment changes?