For short info that said this EpicWar is money grabbing. The fact , game required crystals for all the content . But you can easily farm crystals by doing PvP and convert PvP Point to crystals . And surely if you reach later lvl on hard or early Epic , your crystals balance will be overloaded and you will confuse how to spend them . And for kreds heroes and titan , yes we sell premium content , its 30% of the content guys . We have 10 teams dedicated our 15months for make this game , we wanna keep making games on upcoming months so we need food for our stomach :) . Tough you can enjoy the game and finishing all stages without premium heroes and titans.
For some complain the speed of the unit. Speed is depend on the class, character . In mid level character you will have a good speed. If combine by a speedy class, speed is faster. Plus you can give them haste spell which can be used by KhanKong and Marchesa. Will boost lot of unit speed. Keep this up if you find this helpful.