'Specific needs' - like a pacey wide forward who also shows consistency in their final pass ( tbf today wasn't Garnacho's worst game, and not just because of the goal and assist). Or a CM who doesn't get bullied, has some pace and can distribute the ball quickly to the 10s/WBs. Or a finisher who can also press and hold the ball up. Those aren't exactly niche demands.
People do also know that Amorim's teams don't spend every minute of the match purely in a 343 (regardless of being in or out of possession), right? That the 343 basically demands the same kind of players as a 433, except with slight positional and general off the ball-tweaks and demands. If anything, ETH was far more 'weird' in his personal demands re. player profiles, despite playing 4 at the back, and is a significant reason why, despite 600m, the squad is such a messy patchwork of profiles that can't consistently gel in the PL.