Why are people acting as if there's some sort of tradeoff going on between "good writing" "good gameplay", and "good graphics"? These are not mutually exclusive in the least.
You could make the argument that all of the above represent time investments, but really, due to the differences in skillset for the three - it's often the case that they get handled in parallel by different people, thus making it so that there's really no competition between them. Additionally, Graphics are fairly easy to make good - requiring not so much investment in terms of manpower/hours, as highlighted above, so you really have no excuse.
[A]re you willing to tolerate some graphical weakness if the campaign offers something else that interests you?
Campaigns by definition
should offer things other than graphics, if it doesn't then it would be an asset pack (with missions?), not a campaign.
Now that we've established that some sort of good storyline and/or gameplay is required, and that this is not mutually exclusive with having good graphics, let's rephrase that question:
"Will you tolerate graphical weakness (in exchange for nothing that shouldn't be there anyway)?"
The answer is pretty obvious then - no, I won't tolerate graphical weakness because there's no reason I should. There's not reason something should be graphically weak, when you look at its competitors which will all have "other things of interest" anyway, and are graphically stronger at the same time.
Voice Acting>>>>>>>>>>>>Writing>Gameplay
I donno about that, man.
I don't think all the voice acting in the world will save ****ty ass writing.
Or gameplay that's broken or just plain boring.
Given, it's not likely for something that falls into either of those categories to get voice acted, but you never know - someone might have more money than sense, after all.
Sure I'd accept that it comes before graphics, but as stated above, the effort required to get good voice acting is immeasurably greater than that required to have good graphics, and seeing as again, the two do not compete for talent pool etc. - if you're going to get something voice acted, you might as well put in the effort to make it look good too.