honestly that video wouldn't have changed the companys idea - they would have still sold like hot cakes.
So according to hillsonicaudio, all of these are upcoming/planned IEM models from KZ for 2018. So apparently there will be a "less angular" ZS6 (with all the screws and grill) that will be released, but will probably be a part of the ZST/ZSR family cause it uses the same angled cable.
the straight 2-ping terminal needed to go... the bent one is so much better.. in my opinion. but if it can accept both... better for others who prefer it... I personally like the angled terminal. the new zs6 looks awesome. I'm happy they're doing their own thang - Shake that booty KZ... Shake it.