Colorblind assist options aren't a common feature in most games, which don't play well with some gamers. And even the games which do offer colorblind assist options do so in a half-assed way, as an on/off toggle that doesn't necessarily work as expected given that there are multiple forms of colorblindness including deuteranopia, tritanopia, and protanopia.
EA and DICE have taken the initiative to provide a full range of support options for colorblind players in Battlefield 4. May more developers follow in their footsteps.
One gamer took screenshots of the colorblind assist options in Battlefield 4, which look as follows:
via Reddit.