Ajer isn't Van Djik. He's decent, but they are going to need more. Onyeka is decent enough I guess. Remembering they won the playoff and come into the league as essentially the bottom rated side. Southampton, Burnely and Brighton all have more quality, established top level players than Brentford and battled into finishes in 15th, 16th, 17th. Burnely and Newcastle are probably the two established sides I see as most under threat outside of the promoted sides.