Battery
Animation
iCloud (if you know what to do.lol)
Jailbreak
What you can do with notification center after a jailbreak is pretty much endless.
That is all I could think within a 2 seconds thought. To go to 4.3x simply because of jailbreakme.com is just foolish.
Your missing out in, iMessage and iCloud.
Wifi sync was probably the worst idea ever invented.....but besides that iOS 5 is awesome.
I truly find it astonishing that all you see in iOS 5 is "wifi sync and notification center"
Seriously? Wifi sync and notification center? That is "all that's new with iOS 5" that you noticed.
And I thought i was stubborn when I came to giving up iOS 4.lol
And I was stubborn......till I woke up.
I didn't say he should go to 4.3.3 to use jailbreak me.com. I have never used it. I said that if he was unable to update to 5.01 due to not having blobs, it wouldn't be so bad to be stuck on 4.3.3
Yes you can modify notification centre but it still doesn't offer anything useful that SBSettings or Lockinfo does better.
Three of the things you mention:
Jailbreak
Battery
Animation,
Well, youre right. I have no idea what you mean by these.
I admit I don't use iCloud much, I should probably learn more about it, I'm a bit of a luddite about cloud storage; I like to have all my stuff on my own computer where I can touch it
I believe there are many third party cloud services you can use if you didn't have it tho.
iMessage is cool; however I get 5000 free texts a month with my contract so don't really need it. I believe biteSMS offers something similar to iMessage; obviously it only works between jailbreakers.
You didn't mention that native tethering is much improved on 5. We now have personal wifi hotspot. There were already a number of jailbreak tweaks for this already tho.
The camera app is slightly improved, there are millions of camera apps tho. Camera+ is one.
Oh and let's not forget the Newsstand! I personally run "NoNews is good News" as I don't want to pay ridiculous prices for online magazines.
I have to admit Reminders is useful, I use it a lot. But thats mostly because I have Spire installed with a proxy, and Reminders works with it better than Calender. Before ios5 I just used to use Calender. Not sure we needed a sepereeate app.
I just think that once again apple have stolen some ideas from jailbreakers but failed to implement them as well as they could have. The notification centre could be a lot more functional and useful. I think we can all agree that wifi sync is pointless.
I think it's more likely that the OP will be frustrated by the number of new AppStore apps that aren't backwards compatible. When I was waiting for 5.01 untether on 4.2.1 it used to drive me mad "this app requires 4.3.3 or higher"