installed
for me nothing much new
new text and ring tones
lockscreen clock font size can customise
keyboard prediction slight change

no such issue for me

I updated it this morning. My text tone is a customized one made using Garageband. Now, my text tone is still showing that customized tone. However, once I want to change to another customized tone, it shows "None" and my customized tones are no longer visible on text tone. They can only be seen on "ringtone."

Also, finally, we can select two different tones for two mobile no. (useful for dual SIMs), though this has been available on Android for years.

Delete and reinstalled. Went to maybank but they too cant settle this issue. I tried my staff account on my phone , no issue getting the otp. So its either my phone problem or my maxis number problem but checked with Maxis , no issue.

Don't forget to backup your phone before upgrading.

There's always this 0.0001% of failure chance 
Which brick your phone entirely

Same rate as buying lottery 

No issue here. Using the latest iOS 17.0.1 as well, on 12 Pro Max.
By the way, I'm very new to iOS widget because I don't use one... However, with the standby mode, it looks cool, how to change the clock? It is analog with calendar. I want to change it to digital clock only.

so far no issue with face ID, both devices running on 17.0.3 and 17.1

No such issue, for my both iPhone 15 Pro Max and 12 Pro Max.