I really wanted to like this game -- the characters are fascinating, and it does have good gameplay. But this is one of the most cynical MOBAs out there. Take League of Legends, and cross it with some of the more obnoxious Facebook games. Energy mechanics to play specific characters (although you can spend in-game cash to reset them), Farmville mechanics to gather resources necessary to get boosts.
Rather than League's runes, masteries, and normal 'Q/W/E/R' levelling, you set up 36 possible levels in their own Rune system -- but those runes have Gacha style randomness, different levels of rarity / effectiveness, and you can combine runes together to level them up to level 5. These set up the level up bonuses that you get in match -- and their strength also contributes to the normal level up bonuses you get.
At all steps you're given incentives to pay money -- money can get you double XP towards your characters to increase their stats in a small way, double your rune drops, turn off the green (common, and incredibly weak) drops entirely, and many other things. While this game is ostensibly free to play...it's incredibly pay to win, as well. A person who spends money can buy some legendary runes to start off with that are a good headstart, buy the ability to pick up runes more easily, and buy the ability to get their resources faster to level things up.
The gameplay is fun...but I can't continue to play it with just how horrible the metagame is. Add to this the fact that the game is mostly popular in Russia and other Asian countries, with no regional servers--so you will almost always be matched with 3 or 4 players that do not speak your language, and it's just not for me anymore.