Dota's and HoN's mechanics are such that playing passive as you do in LoL is not worthwhile.
Of course 95% of LoL players can not recognize this because they don't know much about the genre and were lured in with psychological abuses like "free to play". These people will probably not enjoy dota2 since it's mechanics favors things Riot has deemed "anti-fun".
I don't mean to be condescending to LoL players but that is why I don't think LoL will be impacted too much by dota2. I play LoL more than any other game that is not called Starcraft Brood War right now and I know some of my online friends who play it at tournament levels.
Edited by LysIs514, 29 August 2011 - 02:52 PM.