Creating Blocks of Shapes so that it can be called later in other journeys.
I usually use some shapes together and have noticed the format sticking with all my journeys. For example - Send Email - Update Email Sent On - Add Delay - Update Email Sent Status - Check Email Status and so on. If there is a provision to create Blocks, like sub-programs, they can be called as a Block rather than creating the structure again. The journey representation would also be simpler. I think it would make journey creation faster and representation easier to understand.