User blog comment:Braumissomanly/Whats with all the percentage damage?/@comment-25055281-20140817122731

Well, the early season unkillable toplane trio Shyvanna, Mundo, Renekton may have a part on this. You know, sometimes the jungler afk farms till 6 because he uses his ultimate to gank...but early season it felt like the tops would afk farm for 30 mins with little interaction outside their lane and then suddendly appear in game with a 000 kda to be unkillable everywhere (Mundo goes where Mundo wants)

Now, % damage for toplaners may be Riot's answer to mitigate this in soloQ (in 5v5 play the lane swaps and tem coordination can arguably take care of the issue) (grievous wounds could also have been an option...but those also wrek Lifesteal and some supports, %damage looks more sensible)

May be BotRK is currently too good for ADCs v Tanks but I'm not sure, as ADCs are suposed to be able to kill anything in late.