Only thing we need is mobile and technical midfield. Yes, one physical juggernaut in the holding area would be nice, but not obligatory. I think De Jong would be perfect for that role as he's kinda jack of all trades, complete mid, just ar Raki, only younger, faster, more technical under pressure and hungry. Despite what many say about soyboy Puig, i see him as our main creative driving force in future IF we get a coach, who can manage him well. For such a child the vision, intelligence and audacity he demonstrates is very rare. I'm not one of those, who hypes every promising la masia guy, but the feelings i get when watching him in the games against first tier teams is a bit similar to what i felt seeing 17 year old Messi in his early day cameos in CL. Not yet a finished product, but WILL be big.
With mobile, always moving into passing lanes midfield, we could again be great without needing "Rakitic type player". Man City is quite decent example, where most of the team, even defenders, are smallish, but compensate it with great mobility.
Let's hope i'm not mistaking.