I personally prefer the numbering system, could you imagine the naming convention for malefic II or Broil ||? Also to my knowledge in games with the Ruin spell it’s only had 2 variants, Ruin and Ruinga, no ruinra or however else. Even if we go based on previous games, FF1 fire and firaga were single target whereas fira and firaja/za were aoe, same deal with the cure spells and we currently have cure III being the aoe variant (where’s my cure IV SE) and fire IV being single target. For me I like the numbering system from a nostalgia standpoint, but reading your tooltip should always be done when you get a new skill so you understand how it works. If the skill was intended to be a direct augment they would have given us traits to augment them as opposed to a brand new skill.