Arsenal will clearly be able to provide new experience to Michael Olise because if he joins there, he will be able to play in the Champions League next season. However, it seems that what determines it is not Olise's wishes, but rather will be influenced by the amount of money that Crystal Palace can obtain from the deal, and which team really has the seriousness to sign Michael Olise. Whatever the result, it is still a good thing for Michael Olise's career because both Chelsea, Man United, and Arsenal are good teams and could be the right place for him to continue to improve, and get bigger wages.
The temptation to play in the Champions League is tempting, but we also need to see how tight the competition is for places at Arsenal because Michael Olise must be able to get Arteta to give him a place in a position that is already filled. Or Olise will have to wait longer on the bench as a second-string player. Remember Arsenal is full of great players and it won't be easy for Olise to get regular playing minutes. Meanwhile at Chelsea or Man United, there are still many places he can easily get, even though he doesn't play in the Champions League, at least he has a big chance of becoming a regular player. Regarding playing minutes at Chelsea and Man United, in my opinion the competition is not as tight as at Arsenal. All decisions go back to Michael Olise, Arsenal has become a stable club in the Premier League and is always one step away from lifting the trophy that Man City is facing. Do you want to go to a club that is stable but the competition is tight, or do you want to go to a club that is easy to get a regular place in but still needs a process to become stable?