Yes! That is perfect. It looks like the new battery pack still cools the cells from the side. Instead of transferring heat to coolant running through a tube on the sides of each cell, however, the heat is transferred to aluminum fins in contact with the sides of the cells. The fins then transfer the heat to the base plate. The coolant now cools the base plate instead of the individual cells.
So vgrinshpun and AudubonB were both right. Heat is now transferred to the base plate in the new battery packs, but not through the floor of the individual cells. Heat goes: cell wall -> aluminum fin -> base plate -> coolant.
Great find Off Shore!
Since this is only a concept (by someone not associated with Tesla) on how it might be done, it is merely speculation.