^For me, the key part of my first quote is "for no reason". A lot of these new shorts distort the characters' personalities in order to do a certain gag or story. Why on earth would Mickey ever be stupid enough for him to think that Minnie is telling him to lick a dwarf? The only reason is so that we can then see him do it (as graphically and suggestively as Disney can get away with) and the audience gets a laugh out of something so weird happening.
In the Gottfredson strips, Goofy can often be clueless and irritating to his friends, but he'd never eat Minnie. Similarly Mickey wouldn't find dining inside Goofy's to be a pleasant, romantic (or even possible) idea. Yet it can happen in these shorts where doing something gross for the sake of comedy is preferable to working out stories and jokes that stem from these iconic characters' personalities.
Yes, I understand that much of the 'fun' of these shorts is derived from showing Mickey and co doing gross things we never expected to see in an official Disney cartoon. However, I believe that the characters are rich enough to star in all sorts of entertaining, funny cartoons which can and should get a little dark and edgy sometimes, but also stay true to their personalities.