Not sure what you mean by "0.8 patch correct", but it does say in the post from Caribdis that they are to be considered canon.
It's actually such a genius, yet so simple, idea. I've never cared much for the wallpapers with fantasy themes and whatnot, and to instead use them as a way of showing what the girls are up to when Orion's not around, is awesome. It's a very low-cost way (only one or two renders) of fleshing out the characters and expanding on the relationships between the girls. It adds life to the characters when we observe them doing stuff away from Orion.
For instance, there's been reference to shopping trips with Penny/Luna and Penny/Nova (the latter when they got Halloween party costumes) and these wallpapers could be used to give us a short glimpse of what it looked like (like Nova staring wide-eyed at Penny in a sexy costume, or Penny sneaking a glance at Nova's butt). Or Dalia+whoever at the gym, or Alex teaching Annie to swim, or Calypso aiding Nancy in ruling/overseeing her empire. The other side of the coin is that these off-camera scenes could be referenced in in-game dialogue if necessary; maybe Alex asks Annie is she wants to join Alex and Dalia for a run, and Annie responds "No thanks, last weekend during our camping trip I learnt that I cannot keep up with Dalia's stamina. I'm going to keep Orion company instead, since we're the only one at home, all alone, not sure what we'll do but nothing out of the ordinary, we're best friends you know. By the way, how long will your run be, in minutes? Just so I'll know when you'll be back, just curious is all".
There's so much potential for the wallpapers, and it builds hype and makes the wait between updates feel shorter when there's is actual content that is canon released once a month or whatever. Needless to say, since it's behind the patreon paywall it's best to keep the wallpaper scenes to things not important for the plot, and instead only for characterization.