Automatic calculations, rollup, whatever it is should be able to be turned on or off - all the time - look at other softwares - MS Project is one - it naturally rolls up. To have to constantly select it each time someone makes a change is exhausting. It will also go rogue sometimes and change dates - its really frustrating. I have to coordinate multiple teams for our planning, and we constantly have to be rechecking that automatic calculations is turned on, for many layers deep.
PLEASE PUT THE ABILITY TO KEEP THIS ALWAYS ON AS A FEATURE!