in 2016, Martial and Rashford looked better than Sane and Sterling While Pogba and KdB were of similar profile.
Alexis has as much pedigree in the league as Aguero, Matic vs Fernandinho is about equal, Mata was on the level of D.Silva before he ran into Mourinho.
Sterling was always good but heavily underrated. I have mentioned him several times whenever the question arises about underrated players in the league. He was a great part of the Liverpool trio trip of him, Suarez and Sturridge when they pushed far into the league, otherwise City wouldn't have paid 50m for him. He had a shaky start there but nothing new. He was always a good player, just underrated for obvious reasons.
And regarding Mata, players decline as they grow older. That's not a shock for you I believe ? Mata had his peak at one point at Chelsea and passed already. Mourinho only coached him for half a season in Chelsea, under Moyes and LVG he was decent, not great but decent. He has been past his peak for ages and it's completely reasonable due to declining with age.
Also, Aguero is one of the best strikers ever played in the premier league. He will be in the top 5 list of anyone following the lague regularly. This comparison is weird.
The fact is Pep inherited a team fully stocked in midfield and attack but has crap defense and GK, improved both with loads of money and walked the league. United squad was pretty dire at that point with no area with top players except De Gea, midfield and attack were pretty crap.
This City side had won the league and league cup double in Pellegrini first season, and reached CL semi final in his last season + another cup win. We were struggling at the same time finishing 7th, 4th and 5th. They finished ahead of us every season post SAF.
We were either equal or ahead of them when SAF was in charge, but because we fecked up his replacement in Moyes and LVG, and fecked the rebuild in this signing loads of dross while they kept on moving from strength and strength, keeping their squad strong and adding more quality, we ended where we are, with them jumping ahead of us with a good distance. They were already several steps ahead of us when Pep and Mourinho got their jobs, and indeed Pep still managed to even spend more and buy more players in this period.