I've noticed that when I'm using Magic Spells that I have set to Autocast if I log out or disconnect upon logging in I have to reconfigure what spell I want to use. While it's not really important as far as PvP it's more or less an inconvenience.
Not having it save also makes room for small mistakes such as forgetting to reset your autocast and gaining a melee stat on a mage pure or something of sorts.
How it should work; so long as you're holding a staff, wand, or something that grants the ability to autocast it should stay saved even if you log out, disconnect, or something of sort. However if you remove/replace the weapon allowing you to autocast it should remove the saved spell, this is to prevent abuse in PvM or PvP scenarios making combat style switches easier if the spell remained saved.
Not really sure how to buff up this post further over a small suggestion like this, but thank you for reading this small mess of attempting to write a decent post at 6am lol.
Cheers,
~W