I may be alone on this island, but I think Nielsen is a better player than Filppula. Look at how Filppula got demolished as a 2C last year, compared to what Nielsen did at 2C the year prior.
Obviously you didn't watch him play last year. Nielsen looked scared to be on the ice, and he got physically demolished every time he was on the ice. I think it's dangerous for his long term health to get on the ice.
Flip had AA on his wing for the vast majority of the games, and all of the lower lines had Bowey, Cholo, Daley, Ericsson, or Biega playing behind them.
Flip also looked good at 3C with the Isles prior to signing with the Wings. Age is catching up to both players.
It's either Fabbri or Namestnikov at 2C.