The addition of main form dialogs and the new ability to specify their use in lookup field config is super-powerful - great change! For complex Power Apps with complex forms this will save a ton of time for users and it avoids the very common accidental clicking through to the lookup record when intending to click into the field. Big forms can take a long time to load so this stuff was frustrating and confusing for users.
Now we need a related change that's probably quite easy for the same devs - please add similar functionality to sub-grids - allow us to specify that new sub-records, viewing of existing sub-records and clicks on lookup fields/columns in the grid all open in a main form dialog instead of navigating the user away. Granular control of each of those three would be great but control of all in one option would be great for starters.
