What i would like to see:
OUT:
Suarez
Coutinho
Rakitic
Umtiti
Cillessen
Rafinha
Denis
Gomes
IN:
Mobile fast striker (maybe even Griezmann)
De Jong
De Ligt
Young LB (is Cucu good enough?)
And most importantly a proper coach who has the balls to do all of that + can play offensive football.
I would also like to see another striker (more classic 9) and another CM/DM (depending where the new coach wants De Jong) that adds physicality while having good technical skills, Ndombele type of player. But maybe all of that is too much to ask
Barca needs to begin phasing out Busquets and Pique as well, and think about LB situation because the mistake with Suarez shouldn't be repeated.
Cillessen replacement can be someone cheap or la masia if it helps funding more important reinforcement. Having the best backup goalkeeper isn't something that will titles.
Also wouldn't be opposed doing something on RB, i like Semedo but he doesn't look like a long term starter. But that is just a minor problem compared to some other positions and i don't think there is a RB that would be a big upgrade right now.
Not sure about the CB situation. I think De Ligt is just too good to miss out on so i hope he joins, also need to think about a Pique replacement as he turns 33 next season. Maybe Todibo can stay then, a loan would be better for him but someone has to be the 4th CB and ideally it's a fast player and that seems to be the case with him.
So ideally something like that:
ter Stegen, Inaki
Pique, De Ligt, Lenglet, Todibo
Semedo, Roberto, Alba, new LB
De Jong, Busquets
New CM, Arthur, Vidal, Alena
Messi, Dembele, new striker #1, new striker #2, Malcom
Coach: maybe Ten Hag