So, it confirms how Arsenal is not a serious club. 
They have their ST as their loopholes, but have not yet to solved it. They linked to the variuos strikers, but not even an official bid. This is what i've called they're not a serious club. If they're willing to fix it, then they would not delay it, and put it as their priority. Simple as that.
Consider it this way, maybe you're too dull and slow to realize they've done good business. They just don't have striker loopholes, they have sqaud depth loopholes, they have lacked players who can step up when important players get injured. The problem of the club have never been from the manager from the past two seasons but from the management. One thing is certain, they're plotting and trying to solve Gyökeres deal. They have their ST as their loopholes, but have not yet to solved it. They linked to the variuos strikers, but not even an official bid. This is what i've called they're not a serious club. If they're willing to fix it, then they would not delay it, and put it as their priority. Simple as that.
If we look at Arsenal's management, they prioritize business rather than prioritizing the team to achieve achievements so I am not surprised anymore with what happened, Arsenal will never change.