Bringing in a 5th grad has no impact on the staff's ability to bring in an impact frosh for the '17-'18 season. At worst you have an experienced guy who helps the team develop by being a good practice player.
Our coaches don't look at stats or read a message board to determine who to go after.
You are talking about pouring over hours of film, visiting the kid, his family, getting a feel if a kid is the right fit, understanding his academic aspirations, his reasons for seeking a grad transfer etc. etc. Then selling him on Rutgers. Lets say it is somewhere between 70-100 hours to properly evaluate and build a relationship with a kid. Fair? And I imagine if that is the path you take you are talking about multiple kids to review not just hope to go "1 for 1", right?
Not saying the staff shouldn't explore these options, but I guess my point is would I rather have the staff spend those hours on the level of kid you get in a grad transfer to Rutgers or spend those hours "getting in" with a 2017 or 2018 kid, his coaches, advisors, family, etc.
Time is not an infinite commodity (well I guess theoretically it is, but our staff's time isn't).