We've made a similar request before! We would love to have some more information posted on the calendar to save some steps having to go deeper into the customers account page. In our request we also added reservation notes so we could easily see if there were any special request for the reservation. Then having the information being posted directly on the calendar block or as a hover menu for those shorter rentals. Love the idea of a potential color change to help quickly identify if a rental still needs to pay!