This game was/is not much different then many other match 3 games except that you use characters to beat up other characters.
It was quite fun and a way to waste a few hours just battling it out. But then they did a few changes which made it so that if you wanted to progress you had to do whats called grinding (for those that don't know, thats when you have to spend 5 or 6 hours playing just to keep up with others playing). This made things less fun.
Now for the biggest change, if you have any characters that can heal the team during combat its called false healing. Basically what happens is that while in a round, they will heal your characters, but soon as its done, any and all damage that was done to your character during a round gets applied to your characters, which means they will more then likely be instantly down and you have to wait somewhere between 3 and 14 hours for them to heal.
So now instead of being able to play for a couple of hours, you're lucky if you get in a couple of rounds that can last about 5 to 10 minutes at most and then you need to wait till the next day (least for those of us with families, work and who require sleep) to play for another 10 minutes and then wait.
They wanted to stop people from using their healing characters in story mode to heal their wounded characters and instead buy heath packs, which cost Hero Points which while they do come in game, they are very rare in game and they expect more people to buy Hero Points so they can buy health pack. This has basically turned the game into pay 2 win game, well it was before but now its much worse.
The majority of people who play F2P games will never actually put money into free 2 play games. Once it gets to the point where they are spending more then a few hours playing and not being able to keep up with their friends, they loose interest and leave, and start bad mouthing the game, which causes people not to go play that game, which means the game looses lots of money.
So for now I can not recommend this game. Maybe if the devs wise up and actually listen to the community and things go back to how they were a couple of months ago, may I will start playing again and maybe even recommend this game, but lots of things have to change.