I feel like a huge reason they don't support alts as much is phantasias. I recently made a Lala alt, because while I love my Hyur, I just can't resist the urge to be tiny and adorable. I got it up to like level 14ish, And the boredom is killing me.

The alternative of course, is to just phantasia my main.

I'm not going to do it, but I know several people who have. I had a friend that has actually been every race twice before settling back down on her original character.

If they shared things with the alts, they may have never gotten all that money from her phantasias.