I think it’d be beneficial to have the option for data grids pagination buttons to be below the data grid, rather than above. This could simply be a toggle in the datagrid settings. It seems unusual that the buttons currently default at the top, and it is pretty standard for them to be below the grid in other sites and apps. I’m not sure if this is a big deal for anyone else, but I’ve been frustrated by this (admittedly small) limitation a few times.
More control over the positioning of some widget components would indeed be a great addition. Not everything can be solved with styling and custom widgets are always much more effort.
I really hope for the next Mendix Version there ;)