The color of the markers, I cant do much about. I have fiddled and fiddled with them. The images themselves are 100x100 px though the size of the markers is 12x12 in game. If I make them any bigger than 12x12, then I can not get two rows of markers visibly on the cards. What I have come up with as I stated earlier and will be in place on the next release, is updated tip text. So when you hover on an Action Marker it will now say Blue Action Marker or Blue Action Marker Used.
As for the other two requests, I have two feature enhancement requests in for OCTGN itself.
The first is to all players (via the Scripting Engine) to set their player.color. Currently this value is set by the game engine at OnTableLoad (only once when you come out of the game lobby) and is unique for each player and spectator. However for the local players (meaning you) your color is always black, other players and spectators see the (and not changeable) player.color assigned to each player. I have a request in to let me change player.color to the color players select in the game.
The second is an enhancement to players tab. This is where life/damage/channeling/mana pool live along with the players name. My request is to let me add some of my own value such as Mage type to the players Tab. What I sort of envision there is something like: sIKE23 - Priest/Red | Channeling | Mana Pool | Life | Damage
Finally in the log me and ACG have talked about how the game switches back and forth from Player to Mage. It is one of the items we plan on tackling in V2 release of the module next year.