They need that killer because of the way they set up though. Their back 6 are really, really conservative. Havertz and Trossard etc are pretty standard for a huge proportion of teams and they manage to score goals with them. They managed with the same players 18 months ago.They need a forward desperately. Trossard/Havertz etc. are fine as squad players and as players to compliment the stars but they're not players that you can rely on to be the main men. They need that killer.
You just dont need a 20+ goal a season striker to avoid being as toothless as this arsenal team.