Yes, I saw that Logan Air lease also. It's use may be related to the heavy checks on some aircraft. Aer Arann lease all of the ATR classics so there's little incentive to upgrade the cabins of these aircraft other than improving and standardising the customer experience. Such an upgrade programme can be costly and is also demanding in terms of resources to manage the the upgrade. IF NAC or ATR are understanding lessors, they may be open to paying some of the maintenance reserves for a cabin upgrade but I think this is highly unlikely.
In short, it'd be great to see them upgrade the aircraft but I doubt it will happen. It's much more likely we'll see some of the older aircraft repainted at their heavy checks in the future. It's less costly and you get more "bang for your buck" in terms of presenting a standard image to the public.
All the best,
P2C