There are a lot of people saying it is hard for new players to get into the game because the last few sets are critical to own yet impossible to find. This has prompted a lot of ban talk. I would like to propose that a better solution to this problem would be to construct a new tournament format specifically for people who are just entering the game, a block format much like other CCGs adhere too. It would be comprsed of only the latest block of cards (in this card 5 point shurken).
The format would exist for a year untill the next watermark was introduced and then the cards would fall off into standard rotation for another year (where they were legal at the same time as the block rotation). This gives entry level players a great oppurtunity to get involved in the game and mantain competitiveness with a limited card pool. After a year any player would then be ready to go into the standard format without any expendature to catch up needed.
I for one know back when I played Magic I had like 4 decks with me at all time, one for each popular offered format. I know for certain if we had an official and supported (IE Block tournamnets at major cons, prize support, and at least one coolest prize in gaming awarded) "Block" format I would totally have a deck for it at all time with me, as anyone who's played set 12 only games can attest that it is balanced and fun as hell. This would also help squelch any talk about banning a card due to availabliity, because all the cards would be readily available for the format. You could leave the big budget bank account games to standard format and legacy. Hell if a new player has no desire to play in standard and only wants to play in block, they could easily sell all of thier cards from the current block every year once rotation hit to finance thier block decks. The cards that they have would be of great value to a standard (still legal for a year) or legacy deck.