No, there is no need for fluff. Geezz..
I have not said that what you wrote was indecent or disrespectul. I hid it for just being a generalized vent/rage post about your unhappiness with the device. And i asked for decency and respect. Maybe not the right words in this case. I apologize. English is afterall not my native language.
From my viewpoint your post just appears hyperbolic, as you claim the device to be entirely unusable, but at the same time you are also ignoring any assistance offered.
For that matter, i could say the same thing: I‘ve seen many people who love the devices and have no issues with it. I was just at superbooth and all the people i talked to about the devices, loved them. Of course they all have something they want different of feature requests.
Here‘s some facts: The loudest opinions are always the negative ones. Happy users will rarely comment about how happy they are with a device. They will just use it and keep it to themselfs (or share their tunes).
Polyend has promised quarterly updates on what they are doing and so far they‘ve made good on that promise (maybe not always perfectly on time but close to it). They have promised further updates and i see no reason at the moment, not to believe them.
Now i know what you are think: „Oh the mod - talking out of his ass, can‘t trust a word he‘s saying“. 
Can‘t help you with that. Either you believe it or you don‘t.
Now i‘d rather just help you, specifically with the issue that you are having - the MIDI Keyboard:
- I know plenty of people who use it and have zero issues.
- I personally use it all the time and have zero issues.
Everyone has something or some things they are disatisfied with, with their device. But the functionality you just refered to, must work apparently or you would see it all over Backstage ALL. THE. TIME. And yes, there was a recording issue at some point, which I personally even brought up as a bug report and kept complaining about (going through multiple iterations) until it got fixed.
So maybe.. in your case.. there is another issue here?
So once again, i offer my help to get to the bottom of this, or maybe you are dealing with a faulty device. Let‘s find out what‘s going on.
Which leaves me with this: Do you want help!? Or do you just want to complain about it and not accept any help?
I‘d rather help you and get you to enjoy the device like i do, rather than these kind of debates that waste everyones precious time.