Why wouldn't it? Rogue Trader Beta was way worse than WOTR's before release, and WOTR released with good 25% of everything not working as intended, + seems like Rogue Trader in general had less development time.
If anything, Rogue Trader will be even more unplayable than WOTR. The fact that it also comes to PS5, while owlcat can't fix the WOTR PS4 version, and never bothered releasing a PS5 version, is even more concerning.
So no need to pray, just wait for release and wait for actual player feedback.
P.S. it is pathetic that we are worried about things we never thought about 10-15 years ago. We aren't discussing if games will be good or not, we are talking about how much time after release those games will be playable without frustration... It's impossible to buy a 100% working game on release nowadays.
Oh. I saw a few videos of it but it seemed more or less stable. Welp. The obsession with releasing multi-platform when you can't make the PC version work properly in the first place is also a red flag, indeed (certainly was when Larian announced it, while still in very borked EA and releasing as they did - at least there was some window between platforms, but hardly any for the game to become stabler or better).
And yeah, I am in full agreement on the state the games release in, although it's not exactly the fairest assessment at all times - KotOR2 and VTM:Bloodlines might be cult classics, but they released in a horrendous state back in the day thanks to publisher pressure. The difference being that they had been forced out of the oven by an external force whereas Owlcat (and now Larian) seem to take years introducing bugs, shuffling features, and throwing design decisions / bits of writing out to then awkwardly replace them with something else as the deadline approaches (Daisy to Emperor is as blatant as it gets...).
