I don't know why anyone would have expected a new J product here when they literally just completed the fleetwide roll-out of their 'new' J.
That product is not fantastic but it's also no worse than Club World on BA or the WBC on most planes with KLM or the variety of sucky seats on the majority of AF's fleet. I think if all of those competitors had a much better product with aisle access across the board, LH would follow suit but for now they have an excuse as to why not.