I'm not sure how may have realized what's going on in the vid so let me explain:
The TDC Autoupdate button now does what it's supposed to do. You can select to input a specific bearing OR follow the periscope rotation. You no longer need to turn TDC Autoupdate OFF to input the speed, AOB and range. Even more, gone is the old problem of the SH4 Notepad, of sending all values at the same time. Gone is also the need to manually send data do the TDC.
Also, as you can see from the interface, incremental changes to the dials is now supported.

The default interface is perfectly functional and the modded interfaces will have a LOT of flexibility.