Baseball Prospectus is trash nowadays IMO, and the major front-facing guys like Goldstein and Paternostro are where you really see it. The prospect coverage is laughable at times, such as last week when the latter was trying to say that Jobe has now catapulted himself in front of Skenes as a prospect, despite the fact that nothing in Jobe's pitch data has changed. If you thought Jobe was better before (a minor hot take, but plausible enough not to be laughed out of the room), there's no reason to hype it up now.
That said, I think 72-90 is within the cards for this team, even if I am not quite that pessimistic. I think what they are on paper is a 75-win team that hasn't really made any major stake that it's going to play above that caliber. Last I checked, that's where Vegas has the over/under on team wins, and although the whole division is just a bunch of mediocre, it's not ridiculous to lean towards the under there given the pitching uncertainty.
If you get a right tail outcome from Cruz or Hayes offensively, then I think that will start to carry you a long ways towards "this team is as good or better than multiple division teams", but the floor still lies with the pitching. I think the Cubs are decently better than most of the other teams on paper, but just like last year, every team has some significant question marks. It's reasonable to assume the veteran bats in St. Louis won't be so bad, but their pitching is still bad, Milwaukee has probably gotten worse, the young core in Cincinnati is all getting hurt, and the Cubs added but not in a huge statement way,
Probably a little cliche, but I could see us legitimately threatening for the division well into the summer or falling behind the pace by the trade deadline and maybe at best chasing .500 in the second half. It also doesn't seem ridiculous to think that we could be right in line with the mediocre division and then the final two months make or break us, with that 72-75 win range still very possible if a bad few weeks happen in August. We just didn't do enough to step forward. Flaherty, Lugo, or similar in the rotation wouldn't be a showstopper, but it would probably give more confidence that the team's low end hovers around .500 and that a division race is plausible.