There must be more to it than that. Geordie Greig was a strange choice to edit the Sunday rag: he's not an instinctive Mailite like Dacre, he's a chinless socialite, Old Etonian former editor of Tatler, an Americanophile, and a friend of Boris Johnson. I don't know if Greig oversees the online version (or, if not, who does), but surely it's significant that these photoreportages have appeared under someone other than Dacre's watch.
I imagine Greig was hired to reach a younger audience, and to put a bit of fizz into the paper, in contrast to Dacre's bleak, dystopian mindset which can't go down too well with the American readers they're chasing. The lesbian piece — in which the word 'her-story' is used unironically, surely a first for the Rothermere stable — is clearly aimed at the US market. The gypsy story got published, I suspect, because the photographer has contacts in the posh fashion world (Kate Moss, Bianca Jagger, etc) and may be known to Greig or his recruits.
If Private Eye is to be believed, relations between Dacre and Greig are not cordial. If un-Mail-like stories such as these prove to be a popular part of the Mail Online mix, it might jeopardise Dacre's authority — the Rothermeres are obviously more interested in world domination than they are in journalistic consistency. With News International reeling, the opportunity is there, but to what extent is Dacre ill-placed to take it, given his technophobia, his obvious contempt for celebrity culture, his unshakeable pessimism, and the likelihood that he'll get a ribbing from Leveson?