pjanic and pogba are different players of more or less the same level. i'd be happy to keep pjanic: more consistent, cheaper, more humble, won't probably fuck off for the first big offer he gets. i might be wrong though
he lost all of my sympathy when he left, still, pogba is a "one in 20 years" kind of rare talent, who knows what he could do if allegri coached him once again. also, pogba is way too overrated on the market. he never justified his 105m price tag, let alone those 150m he could cost now. pjanic would be worth every penny of his rumored 80m price tag.
compared to these two, sms is just a talented, unproven rookie with insane potential.