I wholeheartdely agree... this update was a letdown.
To start, none of the "new' features really even need a "new OS". Passbook, maps, etc. could all be downloaded from the appstore by those who want them. I have already seen a ton of people upset that passbook is going to be another item to place in the junk folder. While I certainly see myself using it, I am able to see where these people are coming from. For me, newstand is that way.
With widgets Apple had a chance to do a lot. They didn't do jack. They gave us a link to twitter and facebook for quick post. Seriously? Why can't we add widgets downloadable from the appstore? I use intelliscreen X. As it stands it is better than iOS6 implementation.
Toggles are cool, except that I still need to go into settings (though I suppose I appreciate them not being as buried as they were before). Then of course there is the fact that all we are given is a BT and wifi toggle. Again, seriously? Seems to me an optional widget would be the perfect place to implement this. Again, Intelliscreen X anyone?
Maps seems cool, expcet for the fact that people who currently use the transit feature are left in the cold (hopefully Google gives us a standalone download?). As someone who is going to be using public transport heavily once we move to Boston, that is certainly a big deal.
Siri updates were nice. Frankly I feel like that is what Siri should have launched with to begin with. Months after launch third party devs gave us tweaks to siri that would launch apps for us. The yelp and table reservations website (blanking on name) integration is pretty cool. Aside from that, being that Siri was and still feels half baked on current software I feel we were owed this functionality. I am still curious to see how often Siri tells us "I cannot do that right now". Currently, I hear it far more often than I should.
I said before that I didn't think the 3GS should get this update because I felt Apple would be holding back on what their OS can do in order to support a legacy device. Is that what happened here? Well, I am not sure I would go that far just yet, but it certainly is possible.