In general, a poster's number of posts is irrelevant. With your point of view, would you consider a writer that writes 10 books that nobody buys is better than a writer who writes one book but it's a bestseller?
All that being said, although Dareus wasn't doing a lot, he was tying up blockers when he was playing. Only time will tell if there's an impact to the rest of the DL and the whole defense. Based on how the defense has progressed I actually expect another DT will take advantage of the extra snaps.