Questions regarding battery life ... give it time. People have only just installed the new O/S; it takes a while to get a feel for battery life as most people get excited and hammer the system (not to mention installing all the other app updates) which has an impact.
Also, the slow shutdown ... maybe see if it's still like that after a day or so; could be that the system is busy indexing something at the moment, after the new install.
This is getting like the iOS forums. People install the latest iOS version, and half an hour later, having updated 30 apps, complain that the battery seems to have dropped to 95% quicker than it did on the previous release etc.
Just relax and post a complaint thread next week if you're still having issues