Hey there,
often the best way to tackle such an issue is to dive into the html and see which class of the datagrid 2 determines the height of the row.
i checked a datagrid2 and found the following tree of classes that ultimately effect the height:
.mx-name-dataGrid2{
.table{
.td{
padding: ....px; //this is one way to increase the height
}
}
}