The sense (this is conjecture so I of course could be off base) I get is that all the porting they had to do for MN9 proved to be WAY more expensive and difficult than they anticipated. As such, they were shy to offer console ports for this game because they simply didn't have the resources to make a big game
and port it to X number of platforms without publisher support. The issue that follows is of course most MML fans are primarily/exclusively console gamers which leaves them in a bit of a hard & a hard place.
At 1 million they don't have the capital to do two ports. They chose to be democratic in part because that is the nature of Kickstater and, based on their statements (at least how I've interpreted them), I get the sense that playing favorites with console makers can be tricky (unless you take the choice out of your hands ala a backer poll). Personally, just as a parent doesn't let their small child choose who the family life insurance provider should be, I think this choice was too important to leave to backers, especially if its to be post-campaign. The uncertainty involved (will this come out on my system of choice?) is too great. Or at least there is more negative than positive. But again, this is one of those "between a rock and a hard place" scenarios
It really depends on the producer himself. Some contribute more than others. I'm sure Inafune has had some ideas put in games, but that's far from game design.
While I obviously can't tell you every single thing Inafune has done in every game he has helped produce, any statement even remotely akin to "he's never designed a game/has no concept of game design" is trolling and could only come from the mouths of someone who has no concept of what a producer does. It's embarrassing.