Perhaps, but I think that might just be down to the finishing standards of some wide forwards these days. Very few players are traditional wingers these days, and it's almost expected that players in that area of the pitch can finish like Neymar or Salah.
Sterling does fluff his lines a lot, and his finishing technique isn't so polished - but his all round game has been fantastic this season. 15 goals in 23 games is a great return when you consider everything else to his game.