I think my main concern is that we are losing out on the type of players that Bournemouth, Brighton and Brentford seem to uncover with some regularity. Bournemouth replaced - almost seamlessly - 3 of their 4 regular back-line starters from last season, having garnered around £200m in transfer fees. They have brought in Kroupi and Rayan who have taken seemingly only '5 minutes' to settle in and start delivering.
Brighton seem to be adept at spotting and developing CMF.