He was a humorless arse, but I'll miss him. I'll take that (limited) characterization over the complete lack of characterization of most of the bridge crew. It was more fun seeing his (shitty) interactions with Burnham and Pike than most of S1 put together. Much like a good bad guy, there's always room for an arse among the good guys, dramatically speaking. Plus I'm always in favor of Trek pulling the "save em at the last minute, even or especially if they aren't that great or even on your side". It would have improved the end of Beyond, and it would have been nice here as well.
Also, if the positions had been reversed, but with the same dialogue and everything, with Burnham sticking egotistically to her calculations despite the Captain ordering her not to, with this dude having the right knowledge and experience... Burnham would have been framed as a hero for following her calculations etc. Shrug. The trouble isn't really that this dude was a know-it-all, but rather that he was presented as exactly the same as Burnham. Except wrong because he isn't the protagonist.
On the other hand, he was a blip and now I've given this issue far more consideration than it deserves. Let him die. Bring back the Tardigrade instead. As a regular.