Negredo has only just turned 29 mate, and Aguero 26. Jovetic is a baby still at 24, not 26. Zaba's not 30 just yet, Sagna is 31, Kolarov is 28 not 30, Dzeko 28 not 29, same with Vinny. And you need to take a year each off Fernando and Fernandinho. Rekik is 19 not 21.. Ok, basically, whatever site you used to get those ages, well you should stop using that site!
Given that speed is not something The Beast pins his game on, as long a she recovers well form his injury then there are no concerns. Pelle plainly likes the option of a big guy and a more technical guy up front, we have 2 outstanding options for each.
As posted above mentions, GK is not a concern. Hart will still be a good keeper in 5 years so no worries. In general, for every position, we will be on the lookout for younger players to come in and take places of those like Wright in the next 2-3 years. But, have you seen some of our youngsters playing recently, albiet at a lower level? I think we finally have a group of kids, of whom several can make that step up.
Plus, in Pelle, we have a manager who will, and is expected to, bring them through in the best possible way to give them the chance to step up and be first team players. Sure, we'll add to the squad and splurge every now and then for positions we need to fill, but it will be a gradual thing.