In watching the Rutger vs Maryland game I believe the announces commented on how Rutgers had 4 seniors on the OL.
With a 2-10 record, Ash now has to determine whether the staff he has assembled is up to the task or make some changes. If he determines nothing needs to be done with current staff in place then it is great for him and Rutgers.
No problem to worry, question or be concerned then.
The OLine was a major problem last year, was still a problem this year (especially with the shift to spread, the elimination of the FB, and the drop to just one TE), and will be still a worse problem next year.
Not sure where you heard 4 seniors on the OL, though - that's probably in the same reality where we could have gone 6-6 this year.
We had 4 returning OLinemen this year, three of which were seniors, and one of which was replaced by a RS Fr mid-way through the season. So, there were just two senior starters against Maryland. The cupboard at OLine is pretty much bare, though, as the recruiting at that position has been poor for a long time.
Our returning starters going into next year will be Miller (Sr), Cole (RS Jr), and Seymour (RS So)... with just Cole being a real bright spot this year. Seymour wasn't even playing OLine until this past summer. Behind them, we have only Applefield (RS Jr), Heeman (RS Jr), and Jackson (RS So) on the roster who have ever taken snaps. Clark (5.8) and Vretman (5.7) coming in for 2017 are rated more highly by Rivals than any OLineman we currently have on the roster (we have just three others rated at 5.6)... I doubt either will be ready to start as true freshmen, but one or both might be pressed into service.
This is by far the biggest area of concern for next year, and we could really use some help from a grad transfer or Juco. We may have upgraded talent at WR, TE, and QB... but none of that matters if the line is a shambles. Turning around OLine recruiting takes more than a single season.