I'll give you speed and physicality but how are they downgrading in offense? They've scored at the exact same 0.59ppg since 13/14 when Filppula joined the Lightning. Kane might score more goals but they both have the same number of 20+ goals seasons. What you get in Filppula is someone who'll actually be on the ice playing 75 games a year, a great locker room player and a very good two way center.
Even if I concede that the offense is a wash that doesn't address the speed, physicality and fact we have to protect flip...what is Tampa adding to essentially be helped out by getting flips NMC off the books?