An "Apple Senior Technical Adivsor" told you to
wait for a couple more versions?
What were your problems by the way? "total disaster" is a bit vague...
Bluetooth keyboard wouldn't connect - had to use old Windows USB keyboard.
Other devices (iPads, iPhones and non-Mac laptops) had wifi problems.
Fortunately I had TimeMachine backups but some data was lost.
After first upgrade icloud.com mail details wiped from settings.
System re-start caused system to fail totally.
On reinstall no.3 (I think) it worked for 24 hours and at that time I thought it was great. I'd like to be able to use the new features, but guess I'll have to be patient, how long for who knows.