According to map box api you can easily add some properties to change the marker appearance.
Would be cool if we these properties would be passed on to map box
{
"geometry": {
"type": "Point",
"coordinates": [-77.031952,38.913184]
},
"properties": {
"marker-color": "#3ca0d3",
"marker-size": "large",
"marker-symbol": "rocket"
}
}