I do hope valve drops the hats from the requirements for the item set bonuses, while I don't mind paying a few £'s for the new weapons, I definitely don't like the idea of paying £12 per hat to get the item set bonus too
The Sydney sleeper doesn't even seem to work with out the item bonus since your too vulnerable to other snipers, the scout and solider packs are just a straight up upgrades of +25 health and +20 sentry damage resistance respectively, the spy pack seems almost game breaking with the quieter de-cloak just for being visible for that split second longer while cloaking, although the loss of guaranteed disguise does make this not so bad, but for a good spy its going to be hard to deal with. The pyro one is the only one that even seems to be a trade off, 10% movement speed for a 10% vulnerability to the most common weapon type (bullet). And to get these your pretty much forced to buy the hats since the drop chance off these is so incredibly slim now, and with so many hats for each class crafting it is a bit of a long shot
the only real hope there is the polycount bundle which is £30, wish I'd seen that before I bought some of the weapons individually, then it might have at least seemed worth it, but the price of a full game for 5 hats seems a little excessive