It's up to each individual airline as to what way they configure the aircraft.
The 3 year air tanker TCX lease has seat back tv's. GM which is basic white with decals doesn't - but this was only a 1 year lease initially.
Take the Jet2 GL - they goose what way for it to be configured - insisted on their seats and choose what way to paint it. It's up to each airline that is leasing the aircraft how much money they want to put into it. The Jet2 lease is a summer only 3 year lease (apart from the 3weeks for EWR flights) but when it's not on lease to Jet2 the seats r starting and it's still painted.