Lawrence looks a middle order bat 5 or 6, he seems more keen to take it on a bit. I don't think all the younger players are going to make it thru the summer, I'd like as much time as possible but there's a balance of contributing to the team.
Stokes, Buttler/Foakes coming back means we don't need a specialist batter at 6. Not to mention Curran and Chris Woakes(player of the year for us but not bowled a ball for nearly a year for England).
Recent years we have had lots of middle order players,not many top order ones, hence why we probably will give Sibley an extended run, he's done ok so far.
I think Pope is a huge talent, at the moment none of Crawley,Pope or Lawrence really stand out from each other. At the moment Lawrence looks to have more of a temperament for batting, which you only know once they play test matches.
England have to take a punt on potential, as others have said with a developing side (batting) it's no easy task.