Unfortunately, I did not work for DF when this idea was sent to Stefan, so your suggestion was not used during the initial design of this set. I know that is kind of a bummer, but I wanted to be honest with you. I did the "rough" design of this set as the idea was always a passion of mine as a serious DF collector -- and then I turned over the small details to Stefan. I guess great minds think alike!
Don't worry, I hold no grudge about this. In fact I'm quite happy that the project I had in mind did make it to production (well.. except the roof). Your modules are studier and look better than mines.
And maybe there really was no other way to do the floor. I did a lot of other patterns, but this was the only one that allowed grid and pattern match.
I think you should make a private channel for idea submission, and provide small rewards to ideas that makes it into new products.
People could send NEW ideas (not already posted on forums) and would be required to send detailed informations (sketches, photos) of a working model. They would loose rights to what they submit, and have no garantees that they would receive anything, since someone could have sent the same idea before or in more detailed way. You would be the one who decide if an idea is worth it and send a little reward. The rewards could be simply rebate coupons, accessories, or limited edition module (module, not set).
For example someone submitting that you made a Fireplace or Catacombs would have zero chance of getting anything, but submitting something new or innovative would have good chances .
Well, maybe I'll get back at my modular roof system after all...