Steam Crave are still pretty committed to their juice flow and side airflow systems ... the juice flow is best in class and much copied, they'd be foolish to move away from that. Side airflow has some user challenges, it's not for everyone. Bottom fed airflow has lots of fans but it has its drawbacks too.
There's a new single coil plug for the RDTA, Supreme and Supreme Lite. In my opinion it works best in the RDTA to reduce chamber size and airflow and gives a respectable MTL ... though it's obviously an adaptation to a restricted DTL design. I just can't do the MTL thing any more, it doesn't satisfy me. For me all the Aromamizers really work best with big builds and full on airflow.
No current plans for a Kayfun killer.