Could it be possible to set the table text default font size (and perhaps other properties) e.g. in the beginning of the table for all table cells?
E.g. \n
%(font:32)% \n
Header 1, Header 2, %(font:20)Header 3%
1,2,3\n
4,5,6\n
This would make all cells font 32 except "Header 3".