I know, right? CoS is generally regarded as WotC's best adventure. I have no idea why because I've never got it to work, and I'm not alone in my failure. That's not just a PbP problem - it's a problem IRL too. Without a clear and urgent threat, it can feel like "A Tourist's Guide to Barovia".
What's the threat? A short conversation with Anton (or the Vistana we shall shortly meet) will tell you that:
* We're trapped here by the mists. The village of Barovia, under the shadow of Ravenloft, is oppressive and claustrophobic. Vallaki will brutally punish you if you don't feign happiness. And in Krezk, the Frankenstein abbot is several wafers short of a communion. Every place sucks in its own horrific way.
* But that's not really the problem. It's not just our bodies which are trapped here - it's our souls. Even death is not the end here, your soul will be recycled into a new body to endure the recurring misery over-and-over until what remains of your personality is ragged and threadbare. The only respite from the eternal misery is a glass of crap wine, but not enough to get drunk because then the wolves will eat you.
But even if you can get the players to feel this, it's difficult to inject the feeling of urgency, isn't it? This place has sucked for ages, what's the hurry? I don't know. Strahd is supposed to be a BBEG and inspire terror, but as written, he kinda just comes across as a pathetic goth incel with a thing for gingers.
I like CoS for what it tries to achieve and for clever psychological horror (especially Vallaki's enforced "all will be well"), but I don't really know how to fix it as an adventure.
Maybe we could add our own urgency? Like, perhaps Oberron has a bond who will die if Oberron doesn't get back to them with medicine or something?