Been playing this since launch. Game was fun until they destroyed all balance by releasing colab (most new players won't be able to obtain) or very difficult to get units (ML summons, a limited resource) with strong passives. It's impossible to win in end-game PvP without specific team compositions (same 4-7 characters). Given the great cast of characters, it's unfortunate there's no point in collecting/investing in them anymore. The company currently has a strict no-nerf policy, so be warned.