He looks like a heavier version of Pogba, which is a good thing because thats a better fit for de Jong I suppose.
I would be surprised if he doesnt get promoted next season... I dont see us buying (or having the money for) another physical midfielder, and I dont think we should go for one if Ilaix looks (physically) ready already. Hes impressive to say the least. Hes still raw on a technical level, but I am sure he could play a simplified role next to Frenkie and Pedri.
Generelly I am not a fan of (too) young/inexperienced squads, but feck it, we have what looks like the best La Masia generation in ages. And Corona. I wouldnt be opposed to promoting Balde either (well, thats a stretch to be fair).