Can we have more rune types?

One of the problems with runes is that there is no diversity (the word riot loves using) with rune pages. All the same with pretty much every page of a mage, tank, adc, and so on and so forth.

So why don't we have more rune types? I guess there are two ways of interpreting this, in other words we add another 9 slots rune to the mix, but that isn't the type I was referring to. What I was referring to... CUE EXAMPLES

You gain X%AP magic damage on basic attacks You ignore X%armor/resistance Hitting your champion returns X damage based on X (or just returns X damage) You deal X% bonus damage to jungle monsters and, last example, You recover X% of missing health/mana

it wouldn't fix the entire problem, but it could be a start.