Upgraded to Android Pie on Monday. Just noticed that there is no more the "PHRASE BLOCKING" under Samsung Messages. I was using this feature to move the voicemail messages that tells that there is a new voicemail The text in french is "1 nouveau(x) 0 Urgent(s)" ( 1 New 0 Urgent(s) ) that comes from the phone number of the person that left a voicemail. This is the means that Rogers uses to trigger the voicemail notification icon on top of the phone.
BTW: Android Messages does not provide any way to BLOCK PHRASES, only phone numbers. Looks like the providers are blocking this option. This option was available since my Galaxy S captivate... VERY ANNOYING!
UPDATE TO QUESTION - HAS ANYONE SUCCESSFULLY UPGRADED TO PIE WITH THE OTA APRIL 01 LOAD?
On April 6th I successfully downloaded and upgraded the Samsung S8+ (Baseband version G955WVLS5BSA1) without any issue.
No root required when using adb shell, but down side is you will have to do it every time after update. There is a way to do it permanently, but it requires root which I do not want to risk my device with. Just wish they stop hiding the toggle menu icons.