there's nothing outdated about this "cycle", it's how a game like this stay alive.
How can releasing new agents will lose them money?
I didn't say that, I said a 3 month update cycle would, because their income depends on having as many people play for as much time as possible; their concurrent players would drop off a cliff and then spike up again if there was 90 days between updates, the drop of players would equal a loss of income, maybe even a permanent one if those players decide to stop playing all together because of a content draught from slow updates.
What's so complicated about ZZZ design or Persona game for that matter? You're just running around in easy to build levels and fighting stuff. I'd say it's more time consuming to ballance things out that to build levels. Again, ZZZ is not even close to an even complicated game in terms of design, let alone super complicated one.
It's as complicated as any other game, because people actually have to program all of it, you don't just press a button that says "build bayonetta style combat system pretty please", and that goes every single tiny little thing you probably take for granted; the means to do anything needs to be built, and then if the systems intertwine you have to make sure the new thing doesn't break the old thing.
Why is it not adding anything, in what universe? It'll add a lot more to the gameplay as well as not teleport you into completely separate section of the map far away from all the agents and stuff. I'd say it'll add a lot more into immersion as well which TV stuff simple cannot provide and never will in the form it was before.
It's adding nothing, because as I explained, you're just making the bangboo do things that the player could already do, there's absolutely zero point to taking away control from the agent, just to move it to the bangboo, so it can run in the same exact areas, that are just blocked of for some reason, to go and press a button somewhere; it's retarded, you achieve the exact same, and more because it's consistent, just to have the agent run over there to press the button.
If you want to make such a change it has to be meaningful, this is why TV mode exists, because the gameplay is the complete opposite of the combat section, it's literally a different game, and it's modular enough that it fits the production pipeline, so you can create all sorts of interesting scenarios for it, like hollow zero.
If you want to have more focus on bangboo gameplay, then it would need to achieve the same, just running around with the exact same controls to press a button somewhere ain't it, it would need to have a distinct feel like TV mode currently has.
Honkai often changes things up with new gameplay things, like this boss fight suddenly turning into a 2d platformer before the actual 3d boss fight
Or this surfer game before the boss fight
These things actually add something for the player, and can be done because they are essentially one-offs, but bangboo are a constant, so whatever they'd come up with that actually would be a meaningful and fun bangboo game to replace the TV mode, would also need to be constant and it would have to be just as modular, thus changing their production pipeline.