subtables and sudoku

Dear SC,

I've seen arguments that Sudoku is a good use-case for the special "isSubTable" attribute. I don't think Sudoku is a good example. Let me explain why:

Consider for example you have a complete Sudoku board where the initial numbers are printed in bold. When using subtables the lines of the Sudoku board not will be aligned since bold letters have a different height than normal letters (This gets even worse when using different fonts or different font heights). The only way you can achieve this alignment is using colSpans and rowSpans.

Additionally interop with HTML ans WW is not possible.

Just my two cents. Best regards,

~Florian