I'm in the middle of my first naval game on A24, beautiful graphics, and I've noticed that boats seem very unbalanced.
I'm playing Carthaginians against Mauryans. I've got the Reinforced Hull advance and 2 Indian Light Cavalry just sunk one of my Triremes with javelins in very short order.
I've got a fleet of 3 Quinquiremes mounted with extra Ballista and archers that seem to be able to take down buildings in reasonable speed, although one of them was foxed in it's attempt by 3 workers repairing the building at the same time. My 3 Quinquiremes have really struggled to take down a Light Warship. They are still at it after several minutes of game time. I had to pull out one of my Quinquiremes because of the damage caused to it by 2 shore-based archers.
The naval units just seem to be crazily unbalanced in Alpha 24. Javelins and arrows shouldn't be able to sink quinquiremes so easily and they should be able to sink other boats as easily as archers seem to be able to sink them.
I haven't noticed anything too unbalanced in the land game so far.