From the February post, it's implied that the WIPs existed in a vacuum and they were never part of the full, cohesive animation (which is really not smart) and somehow they didn't notice that the audio shit is fully fucked:
I doubt they're remaking the entire animation from scratch and lying about it because the WIPs didn't fit together that much, but the extent of the audio issues were probably not told to us. Of course, Vici could also be the Stanley Kubrick of moaning and glopping sounds and his perfection is not allowing the video to release; softly throwing Kitsune under the bus that it's fully on her now is also really not nice though...
I think they should've just came clear with "hey guys, the audio is super ultra shit for the WIPs and they don't fit together well as a result, we're going to need a lot more time than envisioned. Feel free to unsubscribe from the Patreon if you don't want to pay for nothing (or pause the subs)", the "we're nearly done with the sound! (since March) few more weeks!" is just throwing gasoline on the fire. Of course, I'm just theorizing, so I might as well be just making stuff up, but from what's been shared with us, it seems plausible enough.
I doubt the team is actively malicious, but they kept adding shit to the animation and now they're reaping what they sowed by not having a proper workflow from 2 years ago. I wanna see the new update if anything's different, but maybe the guy who shared his keys with Kemono already unsubscribed lol
tl;dr: Fischl x Slime is the Silksong of H videos.
Also, why wasn't stuff like this shared with the Patreon subs (maybe in the latest update?) and why Kitsune needs to be pressed on Twitter for this info is beyond me: