2014 F450 has a LOWER TC rating than an F350???

If you wait for the 2015's Ford is bringing back the F450 with the 19.5's, chassis can brakes, a heavier frame than the F350 and other upgrades. I would hope the weight capacity should increase back to where it was on the 08-10 F450. Here's the mention along with the new King Ranch.

http://www.autoguide.com/auto-news/2013/09/2015-ford-f-series-super-duty-gets-new-king-ranch-edition-promises-dramatically-improved-performance.html