Ask Peter if I can be the CEO for a day and I'll fix it in ONE DAY!
Maybe you guys should have a FIX SHAPEWAYS IN ONE DAY contest! The winner gets CEO wages for a day! HAHAHA!
Ok, seriously though. I would ask you why you think it is that it cannot be fixed in one day, but I'm aware that you're not at liberty to discuss some of the possibly proprietary operating methods of Shapeways, so you might not actually be able to have a conversation about that. And perhaps there is a whole list of hidden things I am being naive about that would in fact prevent me from fixing it in one day. Regardless, I know that I could create a company like Shapeways that wouldn't have these ongoing problems centered around rejection.
That said, let me just show you one of the things I could do in about the first two hours just to buy me time for the rest of the day. Ok, what is the number one problem with rejections? The number one problem is that the designers are getting perturbed when they feel they are not being treated fairly. Correct? They never get perturbed when they make an actual error and it is pointed out. They get perturbed when they're doing everything right, in their mind, while still receiving rejections of various kinds and in various ways.
Ok, how to fix that. Simply inform designers right there in the design rules that the rules are not actually rules. That if a designer spent a month designing something by the rules it doesn't necessarily guarantee that it won't be rejected.
In this way, prospective designers will know what they are getting into right from the beginning and therefore they will not get perturbed when they get the kinds of rejections everyone is complaining about.
At first glance it would appear that new designers would be reluctant after reading that notice and would shy away from using Shapeways and consequently Shapeways would lose revenue. However, without that notice you're actually losing more business when the foundation stones of your business turn into pillars of hate. When they go out to the public and describe all manor of unfair treatment perpetrated by Shapeways.
I could fix all the other stuff too, provided I'm envisioning the entire picture there at Shapeways and nothing is hidden from me.
If you can think it, you can make it.