Lawrence is fine. We can't have an entire team of 'functional' players, we need players like him to try things because when they work they can be the difference between points or no points (Fulham away for example).
I can see the frustration when he tries things in inopportune situations and his decision making can be improved, but we also don't want to coach him to the point where he loses any creativity and becomes another bog standard winger running up and down the same bit of turf putting in the odd decent cross.
Aye 6 assists. And he's accrued an average rating of 7.18 on whoscored for the season (our 4th highest rated player - although the rating system doesn't really work for GKs so he's probably in truth 5th).
I don't think he's playing poorly. I think he makes incredibly bad decisions at inopportune times and onlookers project those decisions on his overall performances.
I maintain, there is no player in this team who frustrates me more than Lawrence - but he's not playing poorly.
EDIT: For some context on the rating, 7.18 is the same as Tom Ince's average rating last season.