I dont see the problem with having a 'D' to state that something is 100% compatible with D|S and no 'D' if it is not 100% compatible.  Trying to set up a system where you reflect to what degree things are or are not compatible is making the whole thing far too complicated.

I think its looking at it from the wrong perspective to think the D|S users want to know which parts dont work, thats what we can figure out for ourselves. We know Dynamics dont work, we are used to texture problems, light sets that perform badly etc, we almost expect these things.  What we are asking for is quite different:  We want to know which things have no problems at all in D|S, something I think we are very entitled to know!

I dont think people will avoid anything not marked with a 'D', no one is that silly. There are many things that work in D|S sufficiently well to be very useful without being 100% compatible.  However D|S users should surely have the benefit of knowing when something is 100% compatible and requires no additional tweaking, as these are the products that are best suited for the application we use.  Its very simple and logical.

This would also encourage vendors to get their products working 100% in D|S, so that we no longer feel like second class citizens, which is basically the aim of this whole thing anyway.  :)