Originally Posted by Certainlyt
We made Darius's ult true damage for a two primary reasons:
First, we wanted the Darius player to have some certainty over whether his ultimate would land a killing blow. Physical damage mitigation varies widely across champions and builds. It was extremely "mathy" to have to calculate what health was needed to score a kill.
Second, we wanted to make sure Darius's ult did not kill squishy ranged ADs and mages from full with low bleed stacks. When the ult was physical, the damage had to be so high to make it feel good against, say Renekton, that it was abusive versus Caitlyn. Notice that in the example you gave, Darius's lvl 3 Noxian Guillotine at max stacks with 60 bonus AD would be doing something like 300 physical damage to a lvl 18 Renekton with a Randuins and an Aegis.
Except now you created a monster that still gets stacks easy on carries. All you have to do is get to the carry, heck even flash, then drop a combo, if done right that's an easy 3 stacks right away, two more auto's you are at 5, slap an ignite and ult and thats easily over 1400 true dmg. Oh, and it just refreshed too.
Also, his laning is crazy strong. Sure, he doesn't have the sustain, but when he hits 6 and has ignite up all you can think is "Well better not drop to 50% hp or I will die instantly".
Riven may have a crazy lane phase, but atleast I can stack some armor against her to leviate alot of the pain. Health items are ineffective counters because of the sheer cost of anything wortwhile that has enough health to be useful, when you are already zoned from a 1k+ true dmg player.
If you have even made it this far in my rant, Ill go ahead and say this. True damage is literally the single most ignorant thing to add to this game. Don't even get me started on vayne's true damage, why do you think she becomes hyper carry at 6 items. Why do you think Olaf has a broken as hell laning phase, why do you think irelia can still do some crazy good trades. HMMM MAYBE THEY ALL HAVE SOMETHING IN COMMON.