when you're from Northern Germany you do what's practical!
i'm not happy to see them mounting the ESC's to the powerboards based on my experiences with their BL 2.0's but having said that, at 3:57 in the video it shows how to properly attach the motor wires (which is to use just enough solder and no more) as I think an excess of solder has been at the heart of many BL failures. Using too much so close to the FET's allows more heat into the FET's than they can handle and with that they don't last as long as they should.
maybe they'll also sell individual BL 3.0's?
as i said in another thread, MK has been performing well for many years, doing many of the things that we now consider standard and that some FC's are only now mastering! it will be interesting to see if many in the multi-rotor community can forgive and forget MK's shortcomings and give them another try.