I remember when I saw Pjaca's first videos, the first player he reminded me of was CR7. I think what he lacks is of CR7 is his sheer speed (but he isn't slow either), and finishing/power from distance, but hopefully he can be more creative than CR7.
His dribbling, technical ability, strength, size is very C7-eque.
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My dream is an eventual rotation of Higuain, Dybala, James and Pjaca for the front 3 in a 4-2-1-2...Other than Higuain, the other 3 are quite versatile. Pjaca, Dybala certainly can play as a primary striker. Dybala, James, Pjaca can all be secondary strikers and trequartistas with Dybala being the weakest of the three at TQ, but probably the strongest at secondary striker. You could also push James into the midfield in a CM spot too if you're trying for a goal or run a 4-2-2-2.