Even if it was just a data update, there's a lot to be said for playing games with accurate data. I'm sure one of the reasons you lot play this game (I haven't since ICC99ish), is for its realism. The like of EA and Codies have tried to make a different type of game which from playing the demos are good but do not deliver the realism I want (personal view). Therefore just to be able to play with 2005 players justifies £14.99 (Play.com) for me, but can understand if others expect more for their money.
When I think about the hundreds of hours I've spent playing the likes of FM05 (I buy each version each year), the initial outlay is minimal, especially when I take into account the nights I've stayed home playing (saddo, eh?), rather than going out down the pub and spending money. Contrast this with paying £30 for an EA Games product, that I played 10 hours max, it doesn't compare.
If you like this type of game and £15 isn't a serious dent in your pocket, then you'll buy it. I'm grateful they've done what they have. But at the end of the day, everyone has their point of view.