The problem with doing a summer clear-out of those listed players, Manager and Clegg, is you would have to bring in a large number in over one summer just to fill the squad gaps. Wenger said over three represents "a technical risk" and looking at Spurs, maybe he's right.
Undoubtedly you would recruit more talented players, but you'd be better bringing in absolute quality in over quantity.
There are also questions of which teams are ready to take over players like Young and Anderson's high salaries.
City has kept doing clearouts several summers but obviously they're in a special situation.