Tbf Burton are 2.5 leagues below and City played a full fucking strength team.
KDB (getting back to fitness after 5 months out more or less), Silva (getting back to fitness after a few weeks injured), Walker (rotating finally now that Danilo is healthy) and Sane were the only actual first choices players to start today.
2nd leg will be interesting. City could field the U21 team that beat Rochdale in the Checkatrade Trophy and probably give Burton a decent game, but realistically Pep will play a strong team. I'm sure there will be a few more teenagers involved though.