Visual Expression Builder Pickup - copy paste expression and other issues

I find it difficult to copy and paste the expression using the new expression builder. There should be easy way to copy an expression from a condition and paste it to another. Also, I’m not sure how to write false statement i.e !{expression} with this one and it’s quite difficult to write complex expression like {ex1} && ({ex2} || {ex3}). Guide me where did I miss?