much like weather forecasts, crowd calendars rely on history to guess at what happens in the future.
Unfortunately, Disney has thrown a wrench in the works by running parks at (much) lower capacity then in the past. It will take time to gather the data - but, if this trend continues, then this time next year we should have better calendars.
If somebody could accurately estimate crowds/wait times in the future with any consistency regardless of operational changes, they should pick the winning lottery numbers, not run a a Disney website (unless the site is a labor of love, I guess...)