-ga strictly for aoes was only a thing in XI, all other games used -ra -ga -ja for the II III and IV version of a spell regardless if it hit more than 1 target or not.

If they followed the traditional naming you'd have a thundara that is an aoe and a stonera (stonra) or cura that is single target, which means you're not fixing anything.

If anyone is confused about skills they should try reading skill tooltips.