In my experience, analog synths will always require some maintenance.
I've owned many over the years and opened every one at some point.
That being said... I think this fix for the Micro is extremely easy. It is really a matter of removing a BUNCH of screws on the bottom panel, gently pulling it off and then pushing the ribbon cable. Easy to reassemble. Honestly I trust this method of repair way more than shipping the board in for the same repair. You might even end up with a used replacement, who knows how Arturia is dealing with this.
I am guessing after time and movement (mine travels a lot) this ribbon will move and become a problem again. I'm just expecting to make this adjustment on occasion.
I am also trying to figure out if there might be a way to shield that ribbon so that there isn't the crosstalk problem. Any ideas would be great!
I realize this seems like a wrong but I truly believe part of owning any keyboard is the maintenance of it. The MicroBrute is no exception. It is a wicked synthesizer and I am not concerned in the slightest.
Let me know if you have questions, glad to help out!