As for Arsenal being interested in Havertz, that's pretty good, it's just that this will get complicated when Chelsea start increasing their transfer fee. We know Chelsea don't want to lose this time because they have already spent so much on buying new players and the total range is 500 million euros for last winter.
Now Chelsea are going to sell some of their players and it's not surprising that Arsenal want to bring in Havertz, of course they have a good strategy to maximize the talent they have. I still don't know how much transfer fee Chelsea want and if they want Havertz with the equivalent of over 50 million euros I think it's still too expensive.
This action is one of Chelsea's overhaul steps by selling several of its players. It wouldn't be right for Harvertz to stay with the Blues because he wouldn't be able to get anything anyway. I think by joining Arsenal he will be able to further develop his talent and career, Arsenal are a young team who are quite solid in their game, and they are way above Chelsea. It is very likely that he will be able to achieve some achievements if he chooses to join the Gunners. Chelsea reportedly opened a selling price for Harvertz in the region of 60 million euros, I agree with you that this price is too high. Real Madrid have abandoned Harvertz's hunt due to the exorbitant price tag and now Arsenal are negotiating with Chelsea to lower the price a bit.