I'm on Sprint also. Not really happy with this update. I too have been having the notifications bug. Every minute, like clockwork, the notification sound and vibration happens. I called Sprint and they had me do a ##7xxxx# activation from the dialer. It seemed to have worked for a little while. I later found that 1Weather notification was tripping it, I disabled it and all appeared to be fine. That was yesterday. 4 am this morning I got a Facebook notification and again every minute the notification sound and vibe started. Turned off all FB crap and so far so good. Can't comment on battery life yet tho'.
As for the rest of it, the lock screen used to open with the finger print dialog instantly, now it takes about 5 -6 seconds to appear. It isn't any faster, I find it reacts slower. Not a big issue. Overall the phone feels sluggish. It lost some of it's snap. And, the radios are a lot slower. It takes a longer time (almost 2x) to get a gps lock and the LTE lock is laboring also.
I've done a clear cache and have rebooted many more times in the past day than I've done since I got this phone in April.
I have a bit of experience with Android. I have my S4 running Cyanogenmod 12.1 and my S2 is still with me also, it too is on Cyanogenmod, both obviously rooted. Frankly, these phones are very fast and responsive!
kevindharrisii - you can try the route I was on by selecting each apk individually in Sounds & Notifications under notifications App notifications block the notifications. Tedious process. You gotta block then wait a minute, etc. I was doing it alphabetically.
I will close with the fact, for whatever reason, it often takes these phones a few days to settle down.