Broadly speaking, most workflows will not have to be redesigned.
The only places where you will need to focus is where the order of your records matters.
Because AMP breaks processing into chunks, records will come out of certain tools in a different order than they entered.
So if you are calculating a running total, or performing a multi-row operation then it's always a best practice to perform a sort before that operation. However, this would have been best practice before AMP launched anyway.
The biggest change you'll notice is with the behavior of joins, as before the records were outputted sorted alphabetically based on your join keys. This is no longer true with AMP due the chunk processing of records.
Otherwise you should be generally good to go, and in most cases will notice a significant uptick in performance.
