Thank you for the suggestion, we would like to keep the device ‘simple’ in regard that on the left hand side, there’s only input ports, on the right hand side there’s only outputs. Otherwise, I think it’d soon get confusing figuring out which MIDI cable has to go where and what function it works as.
We considered this option for a long time, but we decided to limit the scope of Midihub to be a USB MIDI Interface for hosts, and work with DIN-5 MIDI. This way we can deliver a very high quality and stable product in a very nice form factor and clean user experience.
It does not mean that you can’t use USB MIDI-only devices with the effects provided by Midihub - as long as Midihub is connected to a PC or a device like Raspberry Pi, you can easily forward the USB MIDI data to and from Midihub using built-in OS utilities, MIDI utilities or DAWs, for example, ‘Audio MIDI Setup’ on Mac, aconnect on Linux, MIDI-OX on Windows, I do it myself all the time. 
We would never do that intentionally. Where and when did you post? When producing a post today, we did briefly delete the latest update post, we didn’t like how an animated gif got compressed on Facebook (evidently we are not FB posting experts), so we quickly deleted it, and reposted it again with an image instead of a gif. If you commented during those few minutes, then your comment would be gone together with that post, if that happened, sorry about that!