I think we need to ship out at least one of jones or smalling or both if possible which i doubt. They have been given ample games and time here under different managers but still are clumsy. They arrived here as teenagers/ youngsters and still haven't fulfilled their so called potential apparently. Also I'm pretty sure they wont flourish anywhere else and will end up at some mid to lower clubs eventually. Maybe then some posters who think they are good will realise how mediocre both of them are.
As for signing a centreback, for me there is only one defender which fits the bill regarding all the qualities of a centreback our defence needs i.e Toby Alderweireld. Commanding , experienced, right age, organiser, can play the ball, doesn't shit himself , pl proven so no time need to settle here, a real no non sense defender. The only problem is getting him away from levy but due to his contract situation there maybe a slight chance and if there is we shouldn't hesitate imo to get him. 35 - 40m should do because of his contract situation.
Ideally , move out jones, smalling, blind, darmian, bring in alderweireld and TFM, Axel for other spots for fb and cb