So I bought the big and crunchy Macs all set to try this different method. Then I went out of commission. For weeks the poor things sat in the fridge getting soft and watching all the neighbouring pears die completely. Finally 4 weeks later, I pulled out the apples to find that some were unusable fully or in part, and I decided to make the chunk method instead but using the new recipe. The apples were just fine, but honestly, I prefer the MH recipe that involves rum instead of almond extract. It's just a more comfortable flavour combination for me.
I read on the KA site that the new version is meant to become an apple custard but I'm fine with finding chunks of apple in the cake instead. And yes, Macs worked perfectly and still maintained their integrity as chunks. I tend to call this .... apples held together with a bit of batter cake.
(I bake it in a savarin pan to avoid any muckiness in the centre.)