Where are you projecting him to finish? You summarize the cons pretty well, but I'm not really sure what I'm arguing against or what you take me to be arguing for. Top 5? Top 10? I'm not sure I'm ready to argue top 5, but betting on a top 10 finish is free money. If he's healthy, put it in stone.
The offense was great his rookie year, but it wasn't last year and he still averaged 20.3 PPR PPG, good for 3rd in the league. Fournette and McCoy were also in the top 10 from bad offenses.
Zeke isn't an elite pass catcher, but he has solid hands, runs good routes, and is the 3rd down back. Negative game scripts won't do to him what it does to 2 down backs.