Probably just shitty programming. I suspect shitty programming is the same reason why skipping certain scenes in the game will also skip the Live Trigger in the cutscene, instead of simply skipping to the Trigger event.
Funnily enough, if you all in with say 500 when they have 1000, they only risk 500, or if they all in when they only have 500 and you have 1000 you only risk 500, but if you all in with 1000 and they have 500 you risk all 1000. Even stranger still, if you all in with 1000 while they have 500, if the hand is a draw 750 is given to each player. Really stupid.
And that wouldn't be such a big deal if they didn't make the bet maximum so damned low. You could have the perfect hand, but unless you all in, its possible to only get 100 out of each person per draw.
Anyhow I just finished most of the content of it, so might as well post my impressions while I'm at it:
All-in shenanigans or not the ai is incredibly easy thanks to their extreme biases either to aggressiveness or passivity. The ai folds when they are able to take a free check, again showing the programers rush for getting this thing out. So thanks to that you can turn that 10,000 they hand you to start into 500,000 coins in like 3 or 4 hours, enough to purchase the 4 fragments like they are nothing and 15-20 unicorn horns, pheonix bloods, and elixirs each. You just need to leave the table and start a fresh when the other's money is getting low since the risk reward of all-ins diminishes so drastically.
The new card game was actually pretty fun, but also incredibly easy. There is actually a lot of stratagy to employ if you want to, by looking a few moves ahead to determine the perfect time to get aggressive. The problem is the ace card kindof seems overpowered. I think the reason it was so easy was that if you got the ace card it was an instant win, while the ai often squanders it. It keeps you thinking, but doesn't really put you in much danger of actually losing coins.
I guess in the end even with its flaws I'm ok with this dlc. The poker might not be that great, but its always nice to see a new well done presentation for it that flash games don't bring, and I like that my winnings actually get me elixirs and junk to make getting those fragments I missed easier while flash games get me nothing.
Cut scenes had the usual high production values and the script and characters are very charismatic in it, but the plot was about as non existent as you can get. I still don't know why anyone would buy this if they were going to cheat the system by doing that enter poker table, all-in, leave, repeat exploit to get those metals. You might as well just youtube the 8 minutes of cutscenes. Unless allying with Sazh is really worth 6 bucks to you.