We don't have any updates planned for Card Vault at this time. If it gets back on the schedule, we'll definitely take a look at doing things like these.
For your second question - we do not get the preconstructed decks from WotC, unfortunately. Are the precon decks released with new sets? If so, I could ask and see if they could get us the data whenever a new set releases.
I believe that because of the "Most Recent Printing" stuff that Card Vault does, you can have any editions of a card in your inventory, and it will be counted as the latest version for deckbuilding purposes. So, picking a card at random, if you have 1 "Ballista Squad" from Mercadian Masques, 2 from 9th edition, and 2 from 10th edition, Card Vault will allow you to add up to 5 of any edition to your deck.
Hope this helps!