The concensus in Finland is that the deal is done, waiting only to be confirmed either by NYCFC or Kaiserslautern.
What NYCFC is getting is an attack-minded, yet defensive central midfielder who can also play on the right, which is his position in the Finland team. When he burst through to the national team, he was a rash, aggressive youngster, who liked to go forward and tackle anything that moved, and naturally made his fair share of errors. That has faded in recent years, and Ring has become a calm and thoughtful midfielder who never shirks a hard tackle, but isn't in anyway rash anymore. He rarely loses the ball when in possession, has good skills, and can send a long pass with good accuracy. Not all of those balls land on his team-mates' feet, but that's how it goes. His time at Kaiserslautern has been a stop-start, with many niggling injuries, and constant changes of coaches.
As still relatively young (25) player, and with plenty of experience from tough international games, I think he will be a good addtion to the NYCFC side, but don't expect a flamboyant flair player, because he isn't a Fancy Dan. He's a solid worker with a good engine, who can go from box to box in full speed for 90 minutes.
When playing higher up the field, he can also chip in with a couple of goals, but in recent years he's been mostly deployed as a holding midfielder in front of the central defence.