I understand the point you want to make - but personally I feel the tree should be kept in place: maybe make it narrower, but leave the tree in place . In my humble opinion it serves as a "frame" on the left - "comme un encadrement?". That tree serves to keep or "contain" "everything in place" and I think it's a clever touch by the modeller. Otherwise there would have been a void on the left, your simulation with photoshop indeed places the focus much more on the personalities, but still there's that emptyness like an abyss, which could be avoided by leaving the tree there.
... Well, that's just my humble opinion