I don't think Felix would be signed permanently considering Atletico Madrid ask too much money for his transfer fee. Maybe he would be loaned again. If he doesn't then I think Morata will be the leaving one. Maybe he would return to Italy if there is still interest from there.
Joao Felix couldn't do anything when he was returned by Chelsea, in fact his arrival was not well received by Atletico Madrid so that he will be a loan player again at another club next season. In fact, Joao Felix's fate was not so fortunate that for 2 consecutive seasons he had to be at a club whose status was not fixed, only on loan. I know Joao Felix is doing his best but his current condition and high wages make it difficult for other clubs to borrow or make him a permanent player.
The price and salary are not commensurate with the contribution made, it makes sense that Chelsea are reluctant to make the status of the player from Portugal permanent at Stamford Bridge. Barcelona can make Jao Felix another option if Ousmane Dembele departure to PSG is realized, moreover Felix has expressed his desire to play for Barcelona. I think the process will run smoothly but the final decision depends on the price agreement.
The latest news says that Xavi is not interested in recruiting Felix this summer, maybe this is a matter of the very high price.