The AvA went through a lot of growing pains, with one of the features being no enemy icons for a while. If you have never turned you icons off in AH2 and tried to track movements of another aircraft, then you might not recognize the prominence of the beta dot in comparison. I don't believe they meant it became larger when the icon was removed, but I could be wrong. Someone was complaining in alpha testing that the icon was too close to the actual aircraft and therefore was partially blocking its visibility.