Just want to also add after the update it has been super slow for our
organization as well. It's incredibly annoying and I would take back the
old interface anytime for the increased speed.
I second what darrell.rennie says. What I did recently was remove the
permissions from the proofing folder. Remove permission from folder -
this will disable spell check chmod 000 /Applications/Microsoft
Word.app/Contents/SharedSupport/Proofing Tools...
