I like Gyökeres, but I'm still not sure he's a player who can compete in the Premier League, especially Arsenal. While Portuguese league defenses tend to be quite spaced out, the PL isn't. The Premier League is the exact opposite. Gyökeres's key is his shooting, which requires him to create shots much quicker in the PL; he needs to be fast, otherwise he'll be blocked too easily and won't be able to maintain his place in the PL.
Honestly I agree with you, we know Gyokeres has the ability but the competition in the Premier League is different from the Portugal league I'm a bit worried he's a bit hampered. If you remember when Liverpool bought in Nunez with high expectations but the performance is not very impressive even though previously he was the top scorer in the Portugal League, well this could happen to Gyokeres, right? I hope he can do his best and give something to Arsenal.
By the way, Gyokeres transfer fee is around 65 million and previously it was rumored that Sporting was aiming for 90 million maybe there are additions on the agreement? if it's only 65 million there should be a lot of clubs interested in him.