To be any good at WC3, you need major micromanagement skills: Blizzard games are what brought us concepts like actions per second after all. It's a bit easier in that respect than Starcraft, but still, it's really about multitasking and micromanagement.
You need a lot of knowledge to play Dota well, but you do not need that micromanagement: Pick a simple hero, like Wraith King, and you control a single character with a single active ability. Even top pros take less actions per second than an average warcraft player.
This difference in skills means that it's much easier to notice your own progress in DotA than in WC3. I watch a top DotA player, and I can see how I can get to be that good. If I look at a top RTS player, I realize I could not get that good if I spent a hundred years training.
You need a lot of knowledge to play Dota well, but you do not need that micromanagement: Pick a simple hero, like Wraith King, and you control a single character with a single active ability. Even top pros take less actions per second than an average warcraft player.
This difference in skills means that it's much easier to notice your own progress in DotA than in WC3. I watch a top DotA player, and I can see how I can get to be that good. If I look at a top RTS player, I realize I could not get that good if I spent a hundred years training.