Honestly, most other big MOBA's are extremely easy compared to DoTA. There is a reason pro League players are generally bad at DoTA, while pro DoTA players can get the hang of league quite easily, yes, League has a couple strategic differences that DoTA does not have, but it lacks sorely compared to DoTA. Turnrate, Int Str Agi, Runes, two types of wards, and so many others.

Incoming hate in three... two... one...