To improve the interface, I think there should be a few more buttons on the betting.
We currently get checkboxes for Fold, Check/Fold, Call, Call Any, and Raise. And pre-flop we get x2, x3, and All In. And of course there’s the textbox where you can type in your bet, but I don’t use it very much because I mostly play in Turbo SNG, and if the table is laggy, or if you hit a typo and have to bakspace out and type it over, there just isn’t enough time to type before your time expires and you either fold when you wanted to re-raise someone, or you check when you meant to bet, and it can really screw you up.
Some poker strategies involve sizing bets proportional to your stack. So, it’d be nice if there were some buttons for, say, 10%, 25%, 33%, 50%, 75%, and 100% of your stack. Or perhaps a slider control with “sticky points” at these increments, so that they’re easy to quickly hit the desired amount.
It’d also be handy if there were similar buttons for sizing your bets to your opponent’s stack. I’m not sure how that would work for multi-handed pots, but maybe the buttons would be sized for betting proportions of the biggest stack still in the pot, or something.
Fitting all of these buttons into the UI could be a challenge, so this would obviously need to go through some usability testing before being finalized.