It's not that Newer isn't taking ideas anymore, more that we have what we need to finish our game, now we just need to finish it. I'm sure we will still think up some new ideas and things before all is said and done but some (many) of them ideas on that forum are just bad. I would vote NO to many of their ideas (personally) even if we were capable of implementing them, many we are, many we are not.
We will, however, have more then enough major changes to things that satisfies every member on our team. But really there only 'needs' to be a couple changes, retail New Super Mario Bros Wii is a very fun and awesome game, with a load of content barely touched. If you can't make an awesome level, or game, out of what retail has to offer, you are not trying hard enough.