Typical Paradox, release something bare-bones and fill it out with DLC that should have been base features. Might be fine in a couple of years after the Punic Wars DLC, Gallic Wars DLC, and Triumvirate/Civil War DLC.
Sad yet all too likely, when these should have at the very least been alternative starting dates/conditions, if not an actual year-by-year slider to select exactly in which conditions (belligerents, territories, alliances...) you want to start with. This is such a historically packed period with a *lot* of things that would have had long-lasting impacts on the world (Caesar going East as was the fashion rather than in Gaul? Pompey winning the civil war?). As is, I doubt the AI allows for anything remotely like the historical conditions around those times. I can appreciate that it's unlikely they'll whip up an AI that good (and that actually might end up super boring too), but a set of historically meaningful starting conditions?
They didn't because of how much work is needed for the tribes to more or less accurate. Pinning the big empires of the times is not a hard thing to do,but the small and irrelevant ones are hard to research. There will always be some authist that goes insane because one of the tribes in his home country is not what it was in reality. Tho the whole thing could be fixed if you have thread or a forum where people could post historical information and sources to help the "devs" researchers.
Oh for sure the outrage would be real, but the foundation would be there, the world would mostly look like what it likely was then, and you'd expect mods to simply pop up over time to address some of those issues (meaning Paradox wouldn't even
have to actually bother fixing it). From my cosy chair I see it as low-effort big-payoff but then, it's not my job so I might massively underestimate the issues. The only thing I can think of is that any starting date from Marius onwards would make for a short game, but meh, if it makes for an interesting short game, it has to be a worthwhile alternative to a map painting slog.