Players frequently have statuses, abilities and items that affect multiple numbers on their character sheets. An example would be a Wizard Bladesinger's bladesong ability. When activated, that player must individually adjust their AC by a few, their movement speed by 10, show advantage on acrobatics checks, adjust their concentration check number, etc. All these changes require the user to go into multiple locations and remember to change them when activated and revert back when the ability is deactivated. Bladesingers are just one of many examples of this. D&DBeyond should have a "Conditional Status" checkbox feature added somewhere. When setting up the conditional statuses, they would pre-choose what gets modified when the checkbox is clicked. So for my bladesinger example, I would name my first conditional status "Bladesinging" and select all the adjustments listed above that occur when I activate my bladesong. Then while actually playing, I would simply click my bladesinging checkbox and all my stats would adjust accordingly. Once the bladesong ended, I would uncheck the box and all my stats would revert. Easy use, happy user. 

This would certainly be helpful.

In the meantime it is easy enough to achieve using items and feats.

For example, re Bladesong.