Wow! I am surprised that they are talking about playing all games away from the RAC for a season. You only need to do that if you are making major renovations to the seating bowl or the building structure (e.g., roof line) that will take more than 9 months to complete. I think either type of major renovation would diminish what makes the RAC unique.
I assumed most of the work would be adding amenities in additions that extend beyond the current building footprint, and renovating the concourses. All of that can be done by closing off areas, while still allowing games to be played. Addition of luxury suites (depending on where they are located) and expansion of the Sec 118 area, should be able to be done in off-season, if well planned.
I haven't seen any recent plans or concepts, so I'll withhold further judgment on building changes until we see more details.
However, every attempt should be made to figure out how to keep the games at the RAC during construction. Any other location would adversely affect large portions of the season-ticket base.
Almost all season-ticket holders currently drive to attend games at the RAC. If fans have to drive to Newark or Trenton, it will be a much longer drive for those fans coming from the opposite direction. And while mass transit is an option, it is also a slower option for most, since you have to add the time to drive to/from your home station, and also waits of up to an hour for the next train after the game ends. For a significant portion of fans, this would make attending a season of weeknight games after work virtually impossible.
If it is necessary to play games elsewhere, it would also be necessary to schedule home games on weekends (and that introduces other complexities like arena availability and conflicts with youth sports). Either way, Pat Hobbs should be prepared for a season-ticket holder revolt similar to the one he saw when he forced season-ticket holders to buy a home football game at Yankee Stadium.
A much better solution would be to figure out how to stage the renovations so games can still be played at home. This is how just about every other arena manages their renovations and expansions.