???
You say that Lowe's ONLY value is being the backup LT. That is huge need.
For 20 years, one of the most important aspects of our winning teams was to have JAG's like Lowe on the team. It is critical to have experienced backups who can step in when needed. Obviously, they need to be healthier and better coached.
Given some adequate coaching, that is enough for him to have a long career playing for the patriots.
Saying that injured backup player sucked as a starter is rather typical posting by lots of folks. Lowe should have been on IR for much more, if not all, of last season. The incompetence of management in not getting additional help at OT, even after the season started was malpractice.
Lowe is what he is, a much-needed backup OT, a 4th OT. Even St. Brady found it difficult to play with injuries in the last half of his last season here.
And just BTW, I don't why you think that Lowe can't be backup swing OT. He can play and has played RT. However, for us, he would just be the emergency backup RT on the 53. We have Moses and Wallace (another injured player whose play sucked last year) and we will likely carry a RT or two on the Practice Squad.