Think last year Rose's go missing performances constantly unbalanced our defense, even a mature back line would struggle with his decision making, Verts didn't know whether he was coming or going with Rose's crazy play. That why experience or not a proper left back is so vital, I just want an operational back four this time and that means no Rose and no Naughton.
Experience is key I agree with you but I would be careful to mix that with leadership. The reason I like Stones is that he seems to have everything, he dominates the back line, is quick, powerful, good decision maker the lot, a natural leader I would not pass up the chance if we could get him (which I doubt we will) as he would sort out our defense for the next decade. Everton will not sell though unless a stupid Man City prices comes in so I think Lovren would be reasonable if we can get him. For me though Davies and Bony are the two we should throw everything at.