I don't know why a lot of people are asking for 2 sets and a "last atma used" option. If you use one of your two sets, it's going to become your "last atma used." So you're just going to have two options to do the same thing, unless it ignores any time you use a programmed set. Even then what if your "last atma used" was an elemental resistance set up that you won't use again for a month? "Last atma used" is fine as a temporary fix, but a longer list defined by the user is the overall most sensible and convenient. Most players probably never use more than 12 atma 98% of the time. We all know what the best ones are (and they are best by considerable margin).
And people are talking like option #2 is SO much work. They want to streamline the game so much into 3 sets. That's just going to create lazy people (like all the Abyssea leeches) who will ignore what atmas are best for a job in favor for what they can access quickly. People will use one universal mage set because that's one of their three quick options, rather than selecting the best choices for individual jobs. Having to go through 12 atma isn't going to kill anyone. Everyone has survived (barely) through longer lists.