I doubt I am the only person who is struggling with the maptext feature, while it is very helpful in many uses, having a single color (typically white or black) rarely looks good on the HUD due to visibility problems etc.
I have heard some suggestions to obtain the ideal white text with black outline look which is to have 5 separate maptext objects, one for the white text and 4 behind it with pixel_x +1/-1 and pixel_y +1/-1. I think this is kind of an unfortunate approach though and it seems wasteful.
It would be nice if maptext had support for some other span styles such as
style ="text-shadow:" which is the outline feature that would be so useful.