I'm cool with Traore as both. He's played both roles in the past, and we need better squad players. Look at the other top clubs and what players they can bring in when they have injuries or need someone to change a game. Adama fits in to that category, him coming on is far more likely to be impactful than Bergwijn. Also rotates well in other competitions and will get starts.
If Bergwin leaves then we need another attacker regardless, right? We should absolutely have the ability to sign a few players, that's not FM it happens regularly!