Just to share a little background: our initial designs were of a round poker table but ultimately ditched it for a couple key reasons. We ran into usability issues (eg, the re-raising scenarios were difficult to display clearly, and it took too long for users to read/absorb the summary of action), and the action input wasn't as streamlined (namely, it required far more mouse and eye movement darting around the circle).
It took many iterations to land on what we currently have — the vertical list from early position to late position that eliminates positions in the re-raise rounds — and it proved to be the most efficient for inputting, absorbing, and clearing table action. Ultimately we made this tradeoff to value power usage over first time usage, but we hope to continue improving it and making it easier for first time users as well.