I know this is an old post, but I would like to add some findings. With the exception of general routing and sub/FX sends, I do not recommend loading presets from the 32 AI into the 32 Series lll mixer. Not all aspects translate well.
For example, all Aux out levels were maxed out, EQ settings for highs were also maxed out and because the "Aux" are now Flex Mixes, these did not all translate as expected. I would strongly suggest starting from scratch because it can take a lot of time going through all the settings to verify what was correct or not. PLUS, it gives you a great opportunity to learn the new board and the overall sound is so much different (better in my opinion), so your old presets may not even be what you need anyways.