I would want to speak more in general but this is a gacha game, that's more gacha then game. As a gamer & as a f2p gamer, {in this game} this game Is good in that it has it's own style & gameplay but is also odd in that it lacks game sense. For instance the amount of functions that become free with a subscription. Let's focus on one in particular. The collect money button on the home screen. Everyone can see how it works as paid content. Acquiring it, having it & losing it but simply put it's better free in every conceivable way. It could be a satisfying button every players clicks often. It could be the very thing that creates a bond with the game or addict's players to keep playing. Much like adding girls to their harem or achievements that are not based on lvl. Someone obviously thinks it works better as paid content. Sweet.
Add achievements & secret's. There just fun & engaging. Like clicking on a certain girl who appears in the background of the story missions in each city get's you a reward or is an achievement. It doesn't matter what the reward is, 10 gold, 1k, 1 star girl, doesn't matter, it's fun & engaging. A matchmaking or memory game is almost too perfect for a game like this. You can add it anywhere and it would be great. An event, a daily, I personally think it'd work best if players could play it continuously. This games playtime is not great. I'm tired so I'm done. Ohh & more gimmick girls like Lola rabbet or even the venom chick, a sexy knockoff Marge Simpson, whatever you can get away with lol