They will never be "done" whilst they have such a profitable ground and the money in the bank, with the owners money as well. Their problem is Wenger will not spend the amounts needed to bring in the top players. He is still valuing players based on what you could get them for 5 years ago, its an age thing. A bit like your Grandad telling you he used to have 8 pints, a meal, go to a club and get a taxi home and still have change from a fiver.
They need to move on with a younger manager, but a change at the top is always a risk. I believe Moyes may be available this summer.