I guess that I will just forget playing as Carthage, but focus more upon Rome and Averni (if they receive rhodian mercs).

I have never been much fun of slow moving heavy cavalry, and the only unique unit which Carthage has is Iberian assault infantry while most other factional units are just copies of hellenic ones.

Rome has much better basic army of Gallic aux cav, cretans, and post-marian cohorts. And Averni has better selection of versatile infantry units and basic fast moving cav - cheap AP mercs, high lethality units, Iberian mercs.

I like clone-armies for professional armies are based upon such model (like all wearing the same uniform), while a mix of some rabble is a sign of lack of unity.