Not sure the team can "afford" to develop Arkin for another year - but oline can take time - and he's "durable" compared to others for sure, and he keeps going out there trying to do whatever he is asked - so maybe if a guy deserves one more year, he does. Some guys are slow to develop the power needed - I think it is pretty much a pure strength issue for the guy......I hear/see him get bulled more than I do hear that he is off balance or whiffing on contacting the guy he is supposed to block - he just doesn't get the push/seal he needs consistently......
I just think the team will run out of patience and be forced to go another direction - and we need the 4th RB, 3rd QB, 5th TE, 6WR, etc - so won't carry 10 oline.....