It hasn’t made half of them obsolete
Digne
Mina
Richarlison
Gbamin
Lossl
Delph
Kean
Gomes
All can be used by Ancelloti in whatever formation he wants.
Bernard and Iwobi would clearly be better at either number 10 or tucked infield rather than outwide in a midfield 4. Hasn’t rendered them obsolete, just not as effective.
My point is not that Brands bought poor players, it’s that injuries have exposed the weakness of the team combined with the tactical shift by Ancelotti.
Chelsea bought Jorginho for Sarri, Lampard comes in and changes tactics and all of a sudden Jorginho doesn’t fit the system. Didn’t make him a bad buy, doesn’t make him a bad player, but all of a sudden looks a waste of money when Lampard prefers faster players.