Short term you would certainly be worse off. I don't know where this overrating of Pulisic and underrating of Willian comes from, but it's rather hilarious.
Last season stats...
Willian: 13g, 12a in 3,053 mins
Pulisic: 5g, 7a in 3.038 mins
And that's in a considerably harder league for Willian. Dembele and Mkhi looked like world beaters in that team playing in the same position as Pulisic. Yet plucked out of that team and league, they don't look that special. Barca even wanted to sign Willian because of doubts over Dembele.
You say Willian is not consistent but he's been having double figure seasons in the EPL for the last 3 seasons in a row and he's a 2 times EPL winner.