I liked her in the part, but i have issues as well. She is so fucking emotional and jumpy as no bene gesserit would ever be.
Yet, i don't think it's the actress fault. Villeneuve is so fucking manual on the 'show, not tell' rule that it's impossible to convey the complexity of Dune's worldbuilding without someone go heavy on infodumping as Lynce did in his movie.
Therefore, benefit of the normies, for istance, Jessica couldn't have been stoical while Paul went through the Gom Jabbar ordalia, or the audience would have though she didn't give a fuck of his son. Absolutely not the case, though, as a bene jesserit, she shouldn't have been so attached.
The same when Paul proclaims himself the one the fremen wait, she has a raging almost furious response warning the guy about the choice he was making. Still. You need to give the normies the glympse that Paul is not just a white saviour messaiah that will make everything right. Quite the opposite. And Villeneuve needed to frame, somehow, that that decision was to say the least extremely dangerous if not an open devastating mystake (question still open today 60 years after the book publication
)