Yes, if you make FOLLOW a dedicated switch then it is easier to remap to another configuration.  Same for ACRO.  I was trying to minimize my changes to existing code, but I was tempted to break the MODE_SW into two separate switches : ASSIST_SW & AUTO_SW but with the thresholds set at default to act as a 3pos (would be invisible to standerd setup users).  I agree, if we think we are going to change parameter names, better to do all at once with a big announcement.  I also like the ALTHOLD and POSHOLD names - more intuitive for someone who hasn't learned what EASY and SEATBELT means.