I decided to give it a try, myself.
First, this is definitely a money-grubbing smartphone game, no two ways about it. You can only take so many actions before you have to use an elixir to extend your stamina bar, and of course you can buy those with money (or you can just wait for your bar to refill over time).
That said, I think there's more to this than people are really giving it credit for. In the game, each unit has unique stats and abilities. Even amongst units of the same class.
The bodyguard on the left is classified as a front-line character, and has an ability called kamaitachi that can attack the whole front enemy line. The archers are classified as mid-line characters, but they each have a different ability. The first one has aim: head which can target two squares directly in front of the archer, and the second one has charge which increases attack power.
Of course, being the kind of game this is, you can also spend money to get better characters right off the bat, like these.
A black mage with fira and a green mage with brave.
You can also equip your units, and upgrade their equipment via a blacksmith by using items you find in battle. And on the pre-battle screen, you get lots of info to help you determine which units to deploy, including enemy weaknesses, and if I scroll down on the page there, it'll tell me the requirements for the quest, like the reward, number of turns I have to win in, and other information like that.
The battles occur automatically, but they'll play out differently depending on which units you have deployed. This is very much like Ogre Battle or Venus & Braves. Your strategy takes place before battle, and then you get to watch it play out. Of course, both OB and V&B do have a limited amount of interactivity in battle, like V&B's ability to shuffle rows and classes having different abilities based on what row they're in. This is obviously simpler than that. But I still find it interesting enough to continue playing. ... whenever my stamina recharges.