Even though your idea is valid and it would make things bit easier, coding such saved-decks menu would take some time, and there are more important things to be done than that (bug fixes, developing new content, etc.)
I have saved some deck codes to my e-mail account as a draft message. It's not too hard to fetch codes there, and since every time you want to play Elements you need to be online, so you also have access to your e-mail.