Well, that does take away a good deal of interest for People to work their way up in ranked. Especially since I have read that a Player that really wants it (And is also pretty good.) can get into the top 100 in a day, with one of the starter decks.
Of course you likely have to be damned good for that, but it still shows that there is a certain lack of importance in working your way up anytime soon if you can do it in a few days if you really try hard enough.
Edit: I always thought it would be cool if there were random rewards for getting to the next Position in Ranked. Or if you are high enough, defending your Position. Something like, Play at least 3 full triple games of ranked per day and stay at the same Position or higher.