QIt would be better to be at Arsenal than Chelsea, Kai Havertz has chosen the best team this season (despite not getting the EPL trophy) because Arsenal have been quite great in the previous season and Kai can show his best performance in the team now.
I assume it is Chelsea's failure they are back chattering so many players in this transfer season.
Havertz can become a very good player for Arsenal like Leandro Trossard who immediately became an important member of Arsenal team. I noticed that the Arsenal coach is targeting players who are versatile and can play in several roles depending on where the coach fixes them to play. Havertz is that kind of player, so also is Declan Rice who has also joined Arsenal. Arsenal will play in many competitions next season, so it is important for the coach to begin to prepare a flexible and adjustable team that will maintain a consistent performance in all competitions.