This is what you get when you cross the old tower defense OMD game with a moba like LoL or Smite. The end result, a half arsed version of each type of game mode.
Toss in some poorly thought out F2P model for progression that will have you realizing that you cant really save up to buy the heroes you want because everyone will be pissed at you if you dont first spend all your earned currency on getting the basic traps you need to be competitive.
The end result, a rather meh, not so fun, game with somewhat appealing visuals (if you enjoy the cartoon style). If you enjoyed the first 2 games, this will just leave you wishing that this one had followed suit, rather than trying to "innovate" and jump on the Dota clone bandwagon.