Injuries are an excuse. The guys who've played instead of Bertuzzi and Sammy are actually an improvement.
Losing Helm hurts. But even then... I think Andersson is better center for Tatar (earlier) and Nyquist (now).
Joakim Andersson is +2 in 37 games
Darren Helm was +5 in 68 games last year.
While Andersson isn't a disruptor like Helm, I really don't think the drop off has been that bad.
I would much rather have Bert over Nyquist. Nyquist is extremely weak. Nashville tossed him around like a ragdoll. I was embarrassed for him. He needs to beef up or he won't last long. Helm is far superior to Andersson. Oh and Zetterberg doesn't suck.