On the topic of Venators, how exactly do we see it going to be? That's aside from being quite a carrier.
My wishful guess would be making the first the "base variant" we see in TCW. Those seem to behave essentially like Battlestars, focusing on carrier capabilities (high squad value + possibly two offensive retrofits, duh) and long range firepower (lots of broadside red, turbolaser upgrade obviously). The second variant is kind of my interpretation, but the broadside projectile cannons seen RotS don't seem to appear in the TV show iirc. So they could be a retrofit introduced during the war, addressing the republics lack of short range fire power. This would also explain the difference in tactics between show and movie. So the second variant could have a whole lot more (black?) broadside power, possibly at the expense of some of the carrier capabilities (one less off refit for example). Obviously both should be somewhat more fragile than the imperial standard