Even if there are no DotA animations the skills are as close as they can to the DotA ones. TraX just like in DotA can spam Frost Arrow that consumes your mp and decreases your target's speed and atk speed. Stealth Assassin just like in DotA has an invisibility skill, gets bonus dmg from behind based on your agility. Warchief is Axe from DotA and deals a fixed pure damage amount to every1 that hits you with a basic attack, with a certain chance, and can agro people into attacking only you for 4 seconds while you get bonus armor. Necrolyte deals damage to the surrounding enemies and heals you for a certain amount of hp, while his ultimate deals damage based on how much HP you have left.
You get the idea :D All the skills complement eachother in perfect synergy and there's no such thing as a useless skill (Like in regular L2).