I agree with that. It should be something that exists to provide greater immersion.
+++
On the other hand, I've considered training marines on ships, similar to how the Athenian marines already operate, but aside from some bonuses, I don't know how to make it work.
http://amodelcastillo.blogspot.com/2018/03/la-armada-imperial-de-roma-rangos-y.html?m=1
Milites Classiarii for example.
We also have the Nautae They are ordinary sailors; they too participated in the combat.
I don’t have a standalone mod specifically for bots, though I did previously upload some tweaked bots to the forum, they’re quite outdated now, though still playable with a few minor fixes. They do have quite a few flaws, however. That said, in the mod I’m currently working on, I’m incorporating the successful features from those earlier bots into an entirely new one. It will include various behavioral modes, pre-loaded tactics along with a few "dirty tricks" if I come up with any, and a degree of randomness in its actions to ensure it doesn’t feel too predictable or formulaic.
That’s right, I started a thread about AI quite a while ago, where I’ve been uploading those bots.