New Memo is NOT a big change
If you read the actual memo, the language is FAR LESS threatening than the public announcement. Public posts are extremely strongly worded. But the memo itself is not even a big policy change. Here is why:
"This memorandum reminds officers and the public...."
"USCIS reaffirms this consistent and longstanding approach..."
In other words, this memo only "reaffirms" and "reminds".
Please do not panic. Public messaging is intended to sound scary and it indeed does appear so. But the memo itself is not that overarching.