Even Dortmund lost Füllkrug to Westham and he is an awesome player for the long term i think they have done all right with Beier.
It was not only the injury of Guirassy that they tried to get Beier as they already haved him on the list for some time.
But now its for sure the best way to have another good young and talented striker that can play when the season starts.
Maximilian Beier is still 21 years old and he can play in some positions (CF, LWF, RWF). Sure, this player is good for a long term. I even assume he can be the next star players in Dortmund. However, I think he will play as a substituted player only if Guirassy and Haller are available to play. But it is no problem because he is still very young, he will have more time to play toward his development progress in Dortmund. The coach will give him more time to play if he can show great progress.
Dortmund to me are very smart for bringing in Guirassy from Stuttgart, I don’t know how they were able to deal that big move from Stuttgart to Dortmund because he’s their main striker there. This has now increased the strength of Dortmund in the forward position and will make them even bid more for the league title.
No doubt it is a great signing, I am very surprised that Dortmund signed him with very cheap price. Dortmund only spend 18 million Euros although his market value is around 40 million Euros. Moreover, he is one of the top scorers in Bundesliga last season, his price must increase in the market. But Dortmund scouts always did great negotiation, they know well how to buy a player with cheap price. Sure, Guirassy will be the main striker in Dortmund lineup now. Dortmund has a new machine goal for the next season, he surely will improve the attacking line of Dortmund.