I personally feel like about 50% of the time, my character is making faces not even remotely close to whatever reaction I'd imagine them having. If I could wish for something without regarding to the work or money behind it - then it would be some kind of pre-set animation personality. Kind of like how you choose your animation kit in PoE2, but yknow... Included in these cinematic sections so we don't have, like Blotters example above, a Lolth-sworn drow making weird faces when encountering death...
I agree that if we're ignoring the costs, having a set of personality options for characters that would influence animations and tone would do a lot to mitigate the problems that crop up from voice acting and cinematics. Even this wouldn't be perfect and could introduce clashes between character concepts and implementation, or even between implementation and players' expectations of the chosen personality option (e.g., "I just wanted my character to be stoic but you made him a jerk!"), but assuming it was done fairly well I'd expect it to be a substantial improvement over what we have now. Moreover, personality options along these lines are a way to make custom characters potentially stand out among the origin set, whose more defined natures allow more specific options and interactions with the setting, while still leaving the further characterization necessary to do so at least partially a matter of player choice.
The main problem is that if we aren't ignoring costs to improve an already costly feature in this way, it presents a rationale that amounts to digging the hole deeper until we come out the other side.
And thus, I can only imagine how I'd feel regarding full (or at least more) voicing for non-premade PCs if it is anywhere near the PoE2 voicing... I still feel this mix of cringing and laughing whenever I think of my character randomly screaming "RAAAAAAAAAWWRRGHHHH!" when I start shooting things... I literally went through every single voice option in PoE2 and almost died out of laughter every time my character randomly went screaming. That is not quite how I imagined my silent, sneaky ranger to approach enemies... :') Meanwhile, I'd say the voice acting in Pathfinder is a rather good "medium" option, where your character interacts and talks (out of dialogues), but in a more... Subtle and neutral way. Like our Tav does right now.
I suppose it depends on the voice sets you choose. I was pretty disgusted with how Kingmaker's male madman voice was basically Looney Tunes chaotic neutral, even if I probably shouldn't have been surprised. The only Kingmaker male voice sets I could really stand were Pragmatic and Aggressive, though to fair I felt pretty much the same about the voice options for PoE I and II. Luckily, those voice sets were limited enough that it was easy to find alternatives for them via mods, which is hardly a realistic expectation for a game that has a fully voiced protagonist.