User blog comment:Care Level/Once again, on Attacks v. Spells./@comment-1330314-20150808203947

I think the core issue with merging all abilities and attacks is that they occupy fundamentally different gameplay spaces. Mages get to increase their power in significant bursts, for example, whereas most AD champions get to gain power more smoothly, which makes for different power progressions. Relying on AP means mages have significant downtimes on their power, whereas AD champions can have more consistent power at all times, and thereby accomplish different functions. Stuff like this also allows different champions to do different things, and have stuff that others can't ( can afford to have tons of crowd control as an assassin because he's an AP champion with low burst, for example). Items that work for AD champions don't work for AP champions and vice-versa, as do the means of countering their different damage types. Ultimately, you're asking to bring all champions down to a unified damage stat, since AP would serve the exact same function as AD, and I think that would remove a lot of the variety and power expression that the current system allows.