I'm not a fan of hot process soap or rebatching either. Fortunately, I don't have to do it very often, but when I do, it's only to save a batch as I hate loosing the oils and will try to figure out some way to save them! I've also done batches like you have mentioned, chunking or grating into another fresh batch...giving a much better soap in the end. Your green would be very pretty chunked into another white coco lime batch! I really don't think you need to recalculate your formula for your coconut milk when using only a 5% discount...you have plenty of room for supperfatting using the coconut milk. I actually use a 7% discount and don't have any problems when using a heavy cream. It's likely that over time, the surface oils will absorb on this batch, but I wonder just how much will absorb from a oil pocket inside.
Time will tell....give us a report in a week or two!!
ps...I still think it overheated
...wierd that you didn't feel a lot of heat from the batch!