I would hope you would. Those numbers were from an 8 year NFL veteran not a guy who has less than a full NFL season and only one college season.
Trubiskey will have well over a 60% completion because they are going to slowly work him into the system. He may have a positive td/int ratio. Depends on how soon they open up the offense. Like it or not they drafted a project and just like the Sox rebuild, they need to stick with it and progress him as he can. If they give him too much too soon, he will cause too many issues and the defense won't win them games.
What you see now and what he, Nagy and the offense look like at the end of the season will be very different things.