Why can't we have Magus and Runeglaive?

We can only have one jungle item anyway... and they serve two different type of junglers... Like am I going to last item Cinderhulk on Fiddlesticks just to keep an empowered smite? Or just throw away the empowered smite end game.. hmm...

This can be applied to whenever you remove a jungle item and replace it with another, that somehow hits another subclass (Unless, it's impossible to balance or something...) Hmm.. I see no reason to have even more options in the jungle without taking out old ones...