I think it's highly unlikely that T&C's will improve until flights are being cancelled due lack of crew and from what I hear its not just about the money, far from it, so any change to address the real issues will be neither quick or cheap to implement.
Norwegian have taken large numbers of ex FR crew and will likely to continue to do so this year, it gets interesting when thinking through how or if they introduce the airbus fleet on order, where will they go and who will fly them, clearly any movement from the NG fleet to the bus will mean a need to back fill the NG jobs, a present there is no plan to phase out the NG, the bus is filling a gap until the MAX turns up in a couple of years time.
Whether Norwegian can poach experienced staff from easyJet in the same way they have from FR i think is unlikely, but there are a lot of people in the sandpit who want out with airbus ratings