They do have counting that does work like that,
like spellcasting, a 1/2 level + 2 * 1/3 level = 1
and can go up from there.
But I can see the problem, say with FiChamp 7
where 1/2 + 1/2 = 1 , but with all three abilities
it'd go 1/2 + 1/2 + 1/2 = 1 with the cap.
They handle skill expertise just fine.
The various wordings can be tighter to more clearly
indicate which counting style they're using.
Perhaps I'm asking for too specific a granularity.