It was arrangements for things in single group but yeah. None of currently available layout options have fixed or at least common row heights. That way it is not possible to have similarities over cards. Thus the dashboard as whole is not pice of art but as the result of coincidences.
I shared an option to force the heights of rows to be locked here
It is not tested against different widgets or layout options, just a snippet to play with. Who knows, it may be useful. I don't have time enough to go through all it takes to say something strong.