Please provide the ability to group labels and ticks in a map grid in a layout.
The group will then share common properties such as intervals.
In our typical layouts each label has a tick. Every time we change the map scale we have to change the interval in two places (thank you for being able to sync X & Y intervals). Being able to reduce clicks required for each scale change by 50% will be fantastic.

Brownie points / Alternative:
This can tie in with the Idea of Central Variables.
https://community.esri.com/t5/arcgis-pro-ideas/add-a-central-variable-list-to-pro-to-use/idi-p/1596871
@KoryKramer here is another scenario for using central variables.
From some CAD tools - you can specify the value of one variable as a factor of another e.g.
labelUTM_Interval_X = 500
labelUTM_Interval_Y = labelUTM_Interval_X
majorTick_Interval = labelUTM_Interval_X
minorTick_Interval = majorTick_Interval/10