Hazaro kind of has a point. If I'm laning against Lion or something, I know exactly what his kill range is at level 6 and the HP pool I need to be at in order to avoid getting instagibbed. The fact that a lot of hero skills follow the typical "75-150-225-300" damage scaling helps a lot with this. You can crunch the numbers fairly easily and quickly once you get some experience in the game. Not once have I ever tried doing this for League, however, because there were just too many variables. Stat scaling, physical damage vs armor, magic damage vs magic resist, a lot of spells happening in "two phases" like Leblanc's shit. And there are so many skills that deal bonus damage as a % of max HP, or are attached to auto attacks.
That said, it was never a serious problem because outside of a few heroes like Annie, and LeBlance, you couldn't really be bursted down from 100-0 thanks to lower impact skills, Flash, Heal, Runes, etc. Occasionally I would calculate the amount of damage my Ignite would deal at any given level but that was it. Not the same in DOTA2. If you're laning against, like, VS and Sven, and they're at level 5, you know they will do 375 in Magic damage right off the bat, so you subtract that from your own HP and you can roughly gauge if you can afford to stay in lane or if you have to go back to base to heal.
In my head, all League skills say "do damage", whereas with DOTA2, I can actually calculate a portion of that damage with high accuracy and consistency. That being said, I feel like this kind of play is pretty advanced, and most players won't be affected by the obtuseness of League's scaling damage because it's never occurred to them to think of skills as discrete amounts of damage.
