I believe some applications were dropped and a couple of others added. You would have to know which ones.
I always add my favorite applications and remove the ones I don't want, Chromium over Firefox, Claws over Thunderbird, VI over EMACS. OK, the last one is just me being an ass.
In any case, I don't think there is one file like a "TASK-UPDATE-LXDE" to change it over all at once.
I also don't change kernels unless i have too. I believe in "if it works, don't fix it!"